We're trying to repro this but haven't managed yet. We'll let you know if we can repro

I have the same issue on my Quest3.
The player.log file shows errors.

Mono path[0] = 'G:/SteamLibrary/steamapps/common/V-Racer Hoverbike/vracer_hoverbike_Data/Managed'
Mono config path = 'G:/SteamLibrary/steamapps/common/V-Racer Hoverbike/MonoBleedingEdge/etc'
Initialize engine version: 2019.4.33f1 (c9b2b02eeeef)
[Subsystems] Discovering subsystems at path G:/SteamLibrary/steamapps/common/V-Racer Hoverbike/vracer_hoverbike_Data/UnitySubsystems
GfxDevice: creating device client; threaded=1
Direct3D:
Version: Direct3D 11.0 [level 11.1]
Renderer: NVIDIA GeForce RTX 4090 (ID=0x2684)
Vendor:
VRAM: 24156 MB
Driver: 31.0.15.3713
Begin MonoManager ReloadAssembly
- Completed reload, in 0.109 seconds
<RI> Initializing input.

<RI> Input initialized.

<RI> Initialized touch support.

Created eye textures with a "separate" layout. The "multi-pass" stereo mode will be used.

UnloadTime: 0.404800 ms
Odin Serializer ArchitectureInfo initialization with defaults (all unaligned read/writes disabled).
(Filename: C:\buildslave\unity\build\Runtime/Export/Debug/Debug.bindings.h Line: 39)

Odin Serializer detected whitelisted runtime platform WindowsPlayer and memory read test succeeded; enabling all unaligned memory read/writes.
(Filename: C:\buildslave\unity\build\Runtime/Export/Debug/Debug.bindings.h Line: 39)

Reset controller mapping to 0
(Filename: C:\buildslave\unity\build\Runtime/Export/Debug/Debug.bindings.h Line: 39)

Fallback handler could not load library G:/SteamLibrary/steamapps/common/V-Racer Hoverbike/vracer_hoverbike_Data/Mono/DBOXSDKWrapper64
Fallback handler could not load library G:/SteamLibrary/steamapps/common/V-Racer Hoverbike/vracer_hoverbike_Data/Mono/DBOXSDKWrapper64.dll
Fallback handler could not load library G:/SteamLibrary/steamapps/common/V-Racer Hoverbike/vracer_hoverbike_Data/Mono/DBOXSDKWrapper64
Fallback handler could not load library G:/SteamLibrary/steamapps/common/V-Racer Hoverbike/vracer_hoverbike_Data/Mono/libDBOXSDKWrapper64
Fallback handler could not load library G:/SteamLibrary/steamapps/common/V-Racer Hoverbike/vracer_hoverbike_Data/Mono/libDBOXSDKWrapper64.dll
Fallback handler could not load library G:/SteamLibrary/steamapps/common/V-Racer Hoverbike/vracer_hoverbike_Data/Mono/libDBOXSDKWrapper64
VR device: meta quest 3
(Filename: C:\buildslave\unity\build\Runtime/Export/Debug/Debug.bindings.h Line: 39)

[FileLoader:Loading] Requesting string file: https://www.judiva.com/vracer/localizationDate.php is https://www.judiva.com/vracer/localizationDate.php
(Filename: C:\buildslave\unity\build\Runtime/Export/Debug/Debug.bindings.h Line: 39)

Can't find track for reverse=False found 0 track objects
(Filename: C:\buildslave\unity\build\Runtime/Export/Debug/Debug.bindings.h Line: 39)

Creating SVGAtlas, this will break FFR on Quest as it creates a camera
(Filename: C:\buildslave\unity\build\Runtime/Export/Debug/Debug.bindings.h Line: 39)

Setting up 8 worker threads for Enlighten.
Can't set camera projection to orthographic when XR is running and rendering to the main view. Camera is no longer valid to use for rendering. Please check camera projection settings of all camera components in your scene.
(Filename: Line: 3284)

Thread -> id: d29c -> priority: 1
Thread -> id: d2a0 -> priority: 1
Thread -> id: d2a4 -> priority: 1
Thread -> id: d2a8 -> priority: 1
Thread -> id: d2ac -> priority: 1
Thread -> id: d2b0 -> priority: 1
Thread -> id: d2b4 -> priority: 1
Thread -> id: d2b8 -> priority: 1
Controller=Oculus Touch Controller - Right type=0
(Filename: C:\buildslave\unity\build\Runtime/Export/Debug/Debug.bindings.h Line: 39)

[Judiva.UI.LocalizationManager:UI] reading external localization from C:/Users/decad/AppData/LocalLow/VertexBreakers/vracer_hoverbike/vracer.loc
(Filename: C:\buildslave\unity\build\Runtime/Export/Debug/Debug.bindings.h Line: 39)

[Judiva.UI.LocalizationManager:UI] Set language: english
(Filename: C:\buildslave\unity\build\Runtime/Export/Debug/Debug.bindings.h Line: 39)

[Socket.IO Implementation] Creating Native Socket.IO instance for NodeServer
(Filename: C:\buildslave\unity\build\Runtime/Export/Debug/Debug.bindings.h Line: 39)

Decadent
(Filename: C:\buildslave\unity\build\Runtime/Export/Debug/Debug.bindings.h Line: 39)

[Judiva.UI.LocalizationManager:UI] Set language: english
(Filename: C:\buildslave\unity\build\Runtime/Export/Debug/Debug.bindings.h Line: 39)

Fallback handler could not load library G:/SteamLibrary/steamapps/common/V-Racer Hoverbike/vracer_hoverbike_Data/Mono/DBOXSDKWrapper64
Fallback handler could not load library G:/SteamLibrary/steamapps/common/V-Racer Hoverbike/vracer_hoverbike_Data/Mono/DBOXSDKWrapper64.dll
Fallback handler could not load library G:/SteamLibrary/steamapps/common/V-Racer Hoverbike/vracer_hoverbike_Data/Mono/DBOXSDKWrapper64
Fallback handler could not load library G:/SteamLibrary/steamapps/common/V-Racer Hoverbike/vracer_hoverbike_Data/Mono/libDBOXSDKWrapper64
Fallback handler could not load library G:/SteamLibrary/steamapps/common/V-Racer Hoverbike/vracer_hoverbike_Data/Mono/libDBOXSDKWrapper64.dll
Fallback handler could not load library G:/SteamLibrary/steamapps/common/V-Racer Hoverbike/vracer_hoverbike_Data/Mono/libDBOXSDKWrapper64
Could not locate a Judiva.StateMachines.StateManager object. You have to have exactly one in the scene.
(Filename: C:\buildslave\unity\build\Runtime/Export/Debug/Debug.bindings.h Line: 39)

Uploading Crash Report
NullReferenceException: Object reference not set to an instance of an object
at VRObjectGrabber.OnDisable () [0x00069] in <6782f2da4ceb4a5ebf45e1e8618d64bf>:0

(Filename: <6782f2da4ceb4a5ebf45e1e8618d64bf> Line: 0)

Curl error 42: Callback aborted

(Filename: Line: 867)

Curl error 42: Callback aborted

(Filename: Line: 867)

It's the same for me too, no way to press the start button.

I use Meta Quest 2

mfg

I tried to play this today and no dice, stuck at intro screen with press start. Index and Index controllers. I tried the Vive wands too but nothing either.

Can't get past the Start screen with HP Reverb G2

Same, Pico 4. I tried all sorts of controller settings, emulating all the different controllers. None of them work.
If devs needs steps to reproduce exact setup we can provide it.
My hands worked until I went into the settings and clicked on the most right tab to change a setting, then, they disappeared and never came back.
Gonna delete any config files and retry.

It looks like this is a problem with the 'Xbox controller' controls. Gazing to highlight buttons doesn't work anymore, so you can't press A to use any interface buttons.

You can delete HKEY_CURRENT_USER\SOFTWARE\VertexBreakers\vracer_hoverbike\localSettings_v2_h3490137782 in the registry to reset your local settings, but I don't really like playing the game with the other control methods.

EDIT: This game received a patch[steamdb.info] 4 months ago that broke gamepad controls. You can get them working again by downgrading your install to an older version. To do so, download Steam DepotDownloader and type at a command line:
Then open up your Steam\steamapps\common\V-Racer Hoverbike folder, delete everything, and copy paste the files from the depot folder you just downloaded with DepotDownloader.

For the devs, it was specifically beta manifest 2197626256146471217 that broke things.