(I am now in a rush to test as many games as possible to help, so please do not mind the cursory reviewing style.)

controls are QWERTY-only instead of layout-independent

a bit low FPS + laggy: because of Unreal Engine

"enter to join" = ambiguous: not Enter KEY, but really ENTERING!

mechanic: choice of next tile seems totally random, would have added a strategic element to be able to SELECT a tile; nevertheless, probably still a strategic element if players cannot share the same tile (not tested with several players, but I guess this is the case).

link to theme = only randomness, a bit loose

like the printed circuit board floor + glowing and the concept; I think it is funny with several players, although the aforesaid idea of adding strategic choice may help, instead of probably only having everyone mindlessly bash Space.

As someone's already said, it's tough to rate an MP game with no-one else joining/hosting. Honestly, I was incredibly unsure about what I was supposed to do. Reading that the game is 'totally based on luck' doesn't fill me with confidence, either - what's the point in gameplay if luck is the only deciding factor? You might as well just flip a coin. Not trying to be a downer - you made a game in 48 hours and that's always incredible :)