This was quite fun, I really like the music
A couple nit-picks:
The primary attack obscures the player hitbox a bit
Enemies instantly spawning on top of me in alterego mode can be annoying
Thank you for playing and for the feedback! Adjusting the primary attack's visbility is on my to-do list.
Regarding AlterEgo - the mode is definitely not for the faint of heart haha. The positions of enemy spawns are mostly the same as Standard Mode, with only the enemy amount and screen-wide formations adjusted to be humanly possible to bypass. It's a mode that requires a fair amount of skill as well as remembering which enemies spawn where. I recommend playing AlterEgo only if you've already had enough of the other modes, or are looking for a really really tough, but 100% beatable challenge ^^