Overall this is a pretty solid game. I feel like the mechanics were clearly interpreting the theme. If it wasn't listed on this page, I'd still know what theme you were going for, so thats really good. I always like purchasing upgrades, so thats a plus as well. Enemies were simple enough, but provided a level of challenge.
I think the my main criticism would have to be the difficulty level starting from the first upgrade station. I did have to run that several times before I adjusted enough. After that section you enter the closed room with the skeleton and wall eye on the left side and after a couple tries, I got the hang of that, but was blindsided by the spawning of another wave on the right side, plus an extra enemy. As a player, I didn't expect that second round. After that, I feel like I had a decent idea of how to play the game. So i think the initial difficulty may be a little high, but i think after the room I mentioned it feels like how I would expect it to play.
The above is the only thing that I feel is worth pointing out. Other than that, very solid. Music and art meshed well together. None of the art, music, sfx stuck out or struck me as being an "odd choice". Congrats on a really solid entry!
Viewing post in Echo Spark jam comments
Yeah, in general, I overshot the difficulty, especially for gamejam standards. I think the skill ceiling is surprisingly high, but the skill floor might be too high as well, since a lot of players reported dropping the game after getting stuck, which is unfortunate but super understandable. Thanks for your comments!