Frequent crashes while leaving fullscreen and slowdown.

[Usami Vision]

The game is acting slow at weird moments, even when my PC is set to high performance mode.
Like in level 6-1, there's a serious FPS drop up to the moment when I go near the second key. Then it goes back to normal.

Also when I leave fullscreen mode during gameplay, the game almost always crashes.

I'm also experience strangely long loadtimes when entering a level from the world map and vice-versa.

Are any of these issues common and are there any fixes?
The game worked perfectly fine on my old PC. These problems I'm having shouldn't really be happening :\

[Usami Vision]

It seems that not playing in fullscreen fixes some of those problems, though that's not all that satisfying...

[JazzyWazzy]

I feel your struggle. I think the problem is that the game doesn't officially support Windows 8, & probably Windows 10 as well. There also might be something to do with the hardware specifications of the game. Even though you have a better (e.g.) graphics card, the game might freak out when reacting to that.

My best solution is to just annoy Team Meat so much that they need to fix the issue.