Super cool concept! I think it's really interesting that how good you are at the game depends on how well you know your keyboard (I'm pretty bad). The upgrade system/way you incorporated the theme was pretty cool as well. Although the player's ability to get upgrades is kinda by chance and on my 3rd run I I spent a few minuets in a cleared room spamming my keyboard trying to get a bunch of upgrades. Overall super cool game and a pretty good entry in general!