Cool little tower defense. Had fun finishing it :)

If you want to continue updating it after the jam, some suggestions as feedback:

- It's currently hard to tell what the upgrades do exactly, is pierce a damage update? Does it make bullets hit several enemies?

- The tower selection being in the path of the creeps is probably not intended, there's a good place to put them in the upper left part of the map.

- Sometimes, bullets would get stuck on screen and get rendered long after they should have vanished.

- Being able to check your towers' range and stats would be great and enhance it a lot

But for a one-week project, this already was quite fun :) Good job, keep on creating!