Really cool strategy implementation. I got destroyed my first attempt, and thought I was killing it on my second, but I died on wave 9. Very clever upgrade and tower system. I think the gameplay was great and well thought out! For post jam updates I would want to be able to remove placed tiles and call waves early maybe for some extra energy or biomatter. But this is really well done. Art is really nice! What program did you use to make it? Great game!