I must say the wave lengths being soooooooo loooooong is quite a big oversight and I'm a little surprised you didn't fix it in time for the release. Meanwhile I'm typing this the 4th wave is still going on. It wouldn't be a huge problem if there was a lot to do during the wave, but even though you are able to place more troops down, that stops when all the slots are filled. I don't really even know why the slots were predetermined and why I couldn't just place down anywhere I wanted. You rack up so much money during the game but then are unable to benefit from it because the upgrades weren't implemented. I'm not a huge fan of tower defense games and I don't think this game innovated on the genre much. I feel it's a very difficult type of game to get the balancing to feel right especially in the time limit of a game jam. The graphics were very nice though and on the cuteness scale I would give the game a solid 3/5.
If you guys have the time, maybe you can try out my game and leave feedback too :) Thank you!