This was fun!
I played against the Computer and won after 47 rounds : D
I like the mechanics, just a few things I'd tweak are, that the shield / attack powerups hardly ever were rewarded for me and the computer. Maybe we were just unlucky.
And I guess have the "Interact" button be space or something, because I sometimes accidentally press Interact when I meant to go up.
Overall a fun game, that I could see being improved upon!