It's a great game, with a great concept. But, I have one issue, and it's that the game is using 5-6 GBs of memory in-game, and it's running at 15-20 FPS. In the menu it's fine, it's running at 60 FPS, and using 2.5-3 GBs of memory. But this might be that my PC isn't the best.
EDIT: all the numbers are with very low settings and eighth resolution.