Don't worry, the game is only around 40-70 minutes in total depending on your play style.
I know that sounds long, so you should find a relatively free evening to play this game.
If you die, you will be teleported to an earlier part of your current level with restored health. You can then make your way back to the enemies (which have been weakened so the gameplay is less frustration).
Why did I do this?
Unfortunately, this game has a terrible issue where the game crashes after you load a save file (but only if you shut down the game first). If you load from a save file but you don't shut down the game, it will work properly (for the most part).
I haven't been able to find out what is causing this issue. It seems to be a coding issue, but I'm not sure how to bypass it. I've checked all collision issues and texture sizes, but everything seems to be fine.
Changed files in this update