Hey guys, we had a similar idea! I like your approach to tower defense, especially the atmosphere is good. A humanoid alien looks cool and creepy. I suppose you have also encountered a problem that in a short time of jam is creating tower defense quite challenging, especially because lots of work must be done before you can playtest your game.
I had a problem understanding how large the range of weapons is so I can place towers efficiently. I also sometimes felt a little disoriented from the map. At a later stage of the game, I had nothing to do because I couldn't leave the turret safe zone to build another tower, and the towers in my vicinity had been upgraded to the maximum. So I just dodged the enemies. It would be good to have some time between the waves of enemies, and perhaps a greater life energy income for the possibility of building another new towers.
I also killed myself when I accidentally upgraded the catapult tower. I think it's better if a player can't kill himself by building or upgrading.
But overall it is a good contribution :sunglasses: