This game was quite fun for the first few minutes and the art is fantastic, but some issues are present.
Some of the abilities are too fast and are hard to see, and have any real effect.
The Water Blades seemed far more effective than the other abilities.
The key bindings are not the most ergonomic, perhaps allowing Mouse Input or Spacebar would be more suited. Because of its key, I found I barely used the blink ability.
After the first 2 or so minutes, the game starts to flatten out, and I was able to just stand still with no input to pass many waves, occasionally picking up loot.
The upgrades a probably a little over-priced for a jam entry, there's no way I was going to unlock any without significant time investment.
The art and audio fit into the game perfectly, and the variation of music helps as well. Great use of parallax to create depth.
Overall great entry!