It's a good idea that you have to move in a tower defense arena, so you can do something while waiting for the enemies, but I found a few small things while playing it.
The movement speed is relatively fast, and the turrets are close by, so I didn't need to spend a lot of time outside the control panel. Also, I didn't need to worry about the ammo, because it automatically fills up while I'm fixing the turrets.
I think both of these could be solved if the ammo was another item on the ground in random locations, so the player would have more to do while outside the control panel.
Also, I found a bug where I moved next to a wall and bugged into it. Instead of going away from the wall, I teleported to the other side of the room. This made me lose at round 13 :(
Overall, it was still a good game, and the game feel was excelent with the screen shake and the white sprites.