Amazing mushroom wars-like strategy! Took me more than an hour to win this but it was a lot of fun. Really good base for a great game but some things to improve as well. Some rebalancing is needed as it's quite difficult to take a lead in the beginning but once you conquer one enemy it's solely about migrating units from capitals to remaining enemies. Upgrades are a nice touch but I never figured out how they impact the units. Do they affect only the ones produced in this tower or all of them? In the end I often forgot to buy upgrades as they didn't seem to make much difference. Also I think it takes too long to get the first upgrade and some instructions would help a lot.
Sorry for a lot of critiques but it's just because I really liked the game and really interested to see how you improve it further. Definitely one of the best games I've played on this jam, top mark for fun and great job! Thanks for making it.