I just finished the 2 last levels today and it took me about 8 hours

4 hours-ish, probably less, been playing more because i like trying to get higher on the leaderboard.
i've played this when it was first released free on their website which is now the demo and I got it on mobile before getting it when it came to steam so i knew what i was doing when i started.

I roughly knew the controls in the game.
Took me 7 hours.

Steam says 4 hours played. I like a few others like this -- such as Super Hexagon.

7 Hours, felt like a lot more than that with all the deaths and fast respawns.

Steam says 8.8 hours

4.7 hours. I think I left the game open for an hour or so, while I was afk... x)

Roughly 4 hours. The 4th level in the final lab (second in the bottom row) was by far the hardest. I felt like it just came down to random luck honestly.

11 hours for me but i was afk alot so it was maybe 8 hours of playing

Four hours played, though I admittedly did play the original Boson X back a while ago and beat it - the free version, which only had the original six levels.

8 hours I think

1 hour and 15 minutes, roughly.

Wow I'm bad at videogames lol

6 hours

4 hours