great job what y'all have done here! I really like the pixel art; the fidelity is great and the way the tower animates is really cool and reminds me of mina the hollower tower sequences.
At present, I'd say it just needs a bit of juice! Sounds, little sprite jiggles when making contact with things, maybe enemies that shoot? maybe enemies that also move? and maybe a tutorial, at least textually.
Hope you all had a good jam