I like the take on making a tower defence in a side scroller view, and I think this could very well be experienced further. Also great art style, I will say that not having sprites for the projectile is a bit of a shame since it breaks the composition.
However nice work, I'm just going to list out ways of improvement:
- The UI is a bit overwhelming, it takes a big place on the screen and definitely takes time to get used to it and fully understand it. Plus be aware that it does stack when you press escape in the shop, may be bug prone.
- The game pace should be more tense I believe, especially for the earlier waves, everything feels very slow you need to wait a lot of time while there isn't a huge threat on the screen.
- The shop is definitely a nice mechanic and I like the 4 items, however I had this bug when the shredding tower would down enemies to 0 health without killing them