Minimalist design is often good. An enjoyable enough game. I didn't read the instructions before hand, yet eventually found the right keys to control it, and the gist of what to do.
My suggestions:
-Very subtle grey lines in the white board to help your eyes line up with the blocks just that little bit better.
-On hover, make the red or blue blocks transparent so you can see through to the the arrow directions better. Or, place a temporary transparent coloured square as the square to where it will move to as opposed to the arrow. Or raise the arrow, all the way to the top of the cube. (in other words, make it easier to see, when it can't be seen))
p.s. ALT F4 is not an acceptable way to ask players to end a game. :)
No problems at all with install or graphics, looked nice enough. Performed flawlessly on my RTX3060.