I like the artstyle and the character, but unfortunately the game keeps crashing for me on the 4th boss. I've tried lots of stuff to try to get it to not crash but none of them work (admin mode, verifying files, lower resolution, turn off music/sounds, etc.) The game spikes in memory use before the crash. It happened on Toxic 3 too but that one resolved itself after the second load.
If the game didn't have this severe crashing issue I would likely rate positive if the crashing is fixed, even if the final boss is a bit like people say. Also if you fix that I hear one or two of the achievements is/are bugged but I can't verify that myself.