Incredibly fun game! I would absolutely play a "full game" like this, with different arenas, waves, etc. As someone else mentioned, the upgrading was confusing at first (my biggest confusion was that the game lets you "roll" with only 1 die, but that seems to just reset the "Accuracy" stat, regardless of what you put the die into), but once you understand it you can very quickly get a build going that demolishes the enemies.