Hey guys listen this is a very underrated game with lots of potential. Now I do realize you are stuck even if you wanna play it, cause chrome,firefox and even edge stopped supporting Unity.
However, if you download the GameLoad Extension for chrome along with it's Program installed to your computer you can easily play any Unity Game you want even on browsers that don't support it anymore.
https://chrome.google.com/webstore/detail/gameload-play-unity-games/cajoopobkbcpiniljegibngikdbidbkh
^Here's the link and I hope it helps. Please show support to this game, it needs it.
geniuses like me don't push the red button on lvl 29 u just have to get to the door by phasing through it make ur weakness ur POWER.(+ this comment to keep this alive pls)
 "SPLAT DEATH SALAD"){kind=icon}
 "Mutilate-a-Doll 2"){kind=icon}
 "This is the Only Level TOO"){kind=icon}
 "The Light Temple"){kind=icon}
You can toggle [Settings > Visual > Joints], but it hides all the joints.