Great game, but there are things that made it rather tedious IMO
- the main loop got repetitive and could have been shorter
- the life pickup levels could have been just multiple respawn points instead of having to redo the whole thing
- dodge traversal was not super interesting by itself and when I got careless and died I was simply frustrated that I had to repeat that
And finally while the boss is really neat it's just gets way too frustrating
- shots in the second half come out immediately after which felt cheap everytime even when I knew it would happen
- Some waves might cause the player to take contact dmg on spawn
- Bullets can't be destroyed by using space except the special projectile that can hurt the boss
- The 5th way with the boss shooting too felt like way too much coupled with the fact it gets quite long to get back upto that wave
- No health pick-ups - really?
Also I got the crash mentioned by inarsy, just once though.