Managed to beat the boss after 3 runs. Video:
Really cool concept and great presentation! I can imagine someone good at the game doing some skillful movements, Im bad at moving around, since I cant get used to my movement being tied to my shooting direction, except at the boss where I hugged the ceiling and shoot down. I found wall jumping complicated, since I needed to hold the key against the wall it was difficult for me to jump to go away from the wall to build momentum.I couldn't beat the tutorial. I really didn't manage to obtain momentum or make that "press down while shooting up" movement. I know there is a trick to defeating the shielded enemies but I didn't figure it out.
The sound effects are great and mesh really well with the game. Shooting feels very satisfying. This could make a nice game for streamers.