Fun endless shooter. But a little too easy later on, making each upgrade cost more money than the previous one would be a nice way to balance it out. But I like how many things to upgrade there are. The art and the effects were really nice :D
Thanks a lot for the feedback :D and you are totally right, after game jam I will upgrade the game, I will add also, power-ups, more enemies, different weapons, upgrade cost I will do it as you said, and it will be nice product :D thanks a lot and good luck