It plays nicely but it also has some balancing issues, the tower shooting in both directions is a tad useless for example. I feel like some towers shouldn't be able to get targeted by every enemy, some kind of type synergy would have been better (like flying enemies ignoring rocks and similar structures).
Some kind of progressive introduction of mechanics would be better to understand the game but that's not really in the scope of a jam.
Overall, pretty solid submission.