While the melee combat feels great, the actual game is a bit lacking. Each boss battle really just ends up being a game of predicting the incredibly linear pattern of the current boss, walking away to avoid the projectiles and going back to hit them. There's no real challenge to it, and once I realized that about 2 minutes into the game, I was robbed of having any more fun.
Aside from that, there's no reason you shouldn't have been able to notice or fix the bug of 2 of the same power ups spawning. That should be simple to fix, and without it, you remove a players choice that could have been a really engaging element of the game in that moment.