Thanks for playing!
Yeah unfortunately at this stage it's very much a proof-of-concept.
Which may be addressed in the post-jam update (really depends on how far I get by the time voting ends)
One of the plans was to make obstacles like trees destroyable with currency; then placing things around you in those tiles to aid you. I'm not sure how far that will go though.
I have thought of tinkering with tower placement as you go up the chain, it would've been a awesome if I made it a physics-defense kind of game. But yeah the tactical aspect is lacking currently; hopefully it can graduate from a mobile type game sooner than later! There's a lot of ways to take it from here :)