Very cool! The 3D models, music, and sfx are all really cool. It really works together to create this cool atmosphere on a strange world.
I did struggle a lot. I always die at the first boss wave and I'm not sure what to do about it. I can't seem to build any of the new buildings I buy. I can only max out on the tutorial defenders and they don't seem to be enough to beat the boss. Maybe I'm just bad lol.
I think I would also like to strategize more over the placement / positioning of the buildings. Maybe that happens if I get further in the game but in the first few waves I couldn't tell if it mattered where exactly I placed the buildings.
Nonetheless your hard work really shows so well done!