The arena was really fun! I liked the constant early level ups and the shooting action. I tried the temporary power ups but it seems like long term stat upgrades are always better. The game ramps in difficulty quickly and by level 12, it seems my firepower can never overtake the hordes of enemies and I lose.
It might take a lot of code to implement but I think a rotating shield around the player that can deal damage would be a fun mechanic.
I figured how to create projects and move them, but for some reason I cannot add tasks. It's a good idea, but the productivity part of the game doesn't seem to have any connection to the game part of the game. Maybe there is a way to tie them together, or maybe you should focus on one over the other?
Good job getting this up early!