It doesn't but I'm going to add a damage-over-time upgrade to the poison ball at some point. Hopefully it will make the poison ball a little more useful.
For me its stuck in stage 29, the go arrow does not appear and nothing I do seems to be working, cheers for brillant graphics and mechanics though, good luck on its further development
Oh bummer, don't you remember anything? Pm me any details if you do please, it seems there's a bug surrounding stages 20 to 30, I'm glad liked it! really sorry for this bug, I'm trying my best to fix it.
Edit: just updated the game regards this issue.
Good game but it needs some changes, 1st it needs lot more ships with different abilities and 2nd the story is unlogical why does enemies send ships that can be captured by virus why not just send shielded ships. I think in story virus shouldn't be trying to escape it must be terrorizing earth and capturing ground vechicles too
Thanks a lot! I'm actually working on an extended version right now. Going to release it soon :)