Really liked the art and sound!
The UI could be more visible, especially on the controls page. The bright blue, skinny font against the background made it really hard to read.
Not sure how you're supposed to be able to get through 100 waves, the spear throw seems like the only way to clear out the hordes of enemies that spawn, but you only seem to get one per wave. Maybe there was some additional mechanic with the spear that I wasn't seeing?