I agree with the others. Tightening up the gameplay loop and fixing the loading issues would help. The shop is a bit unintuitive and you do not feel a progression. You are somewhere in between a puzzle game and a progression based game. Because you do not decide on the resources (things to put in the tower)–which would work in a puzzler where you have to figure out the optimal location for a specific wave (it needs to be more challenging to be fun then), and you do not manage your resources gained which is what would make a progression based game fun. Also just a minot thing, the click sounds needs the top end cut off with a low-pass filter, it’s just kinda jarring when you spam click to hear that repeatedly.
All that said, I did enjoy the game for a bit and I hope you can use some of the feedback:D