How you handle the control is very clever, and it can be improved, but I like it.

I have a great time killing robots!

i like the idea of quirky controls, but being unable to aim because your moving but also being unable to stay still because the enemies will eventually shoot projectiles is not intuitive. Maybe where you aim was independent of where you move, it could work

Going by that menu screen, I'm guessing you were running really low on time by the end :)

• The controls felt a bit off (in that the center determining which way I'd move was actually a bit below the character), but maybe that's Firefox's fault for opening the game in a window of unexpected size. 

• Unfortunately the game is pretty easy to cheese - there's a distance where you can still see an enemy but they don't shoot back at. Also, there seems to be no reason to ever not be shooting?

The upgrade system could be pretty interesting with a bit more variety - the helicopter body being a sidegrade takes it in the right direction, I think. The graphics unfortunately let the game down - the robots themselves look nice, but the checkerboard nightmare underneath is actually painful to look at :c