I also tried it on a older laptop, that has opengl 2.1 (intel graphics 4500mhd) on windows 7 and the enemies and items are not visible but the surroundings were all fine. The enemeies/items are invisible but I can still hit. It also has a linux OS but the game did not work maybe due to lower specs than my PC. On the PC Windows 10 it works fine, it is just the linux build that isn't working.