Congratulations to the team! There's a lot of great work here, as well as a few interesting ideas. I think with more work this could be quite good. Here are 3 things I'd like to see improved.
The movement feels sluggish and less enjoyable relative to other similar titles. +1 on the dash cooldown being so long I forget that its there.
Better balanced play-styles. Given the # of enemies on screen, playing with anything that slows fire-rate is not fun. The slow movement also necessitates picking upgrades that boost movement speed to have fun.
Improved design consistency and clarity. This game has a beautiful color palette. Similar titles with smaller palettes convey what is happening on screen better with less.
Hope to see more!