Cool game made with pygame

[Milosz]

I'm very glad that someone answered, thank you I fixed bug with upgrade menu, just forgot to change some constant. Now I wonder why do you have another bug with explosion animations, because I run game on Windows and it's working well. I made some very good optimisation in explosion logic(thanks to you, because I'd never see that if u didn't mention about explosion bug), could you try it again and check if there's still a problem?