Also, how to use PSY?
Nvm. To use PSY you need to hold [attack] for about 2 seconds, then release to swing. No idea how strong it is, player stun lock prevents any effective use against non-stationary enemies.
Also, tip for the first boss, just farm the squirrel under the first save point for levels and money to by health from the shop, then just stand in his hitbox and spam [attack]. There is no real tactic that is more effective, even if you tried to actually doge his jump and slowly chip his health away, his fireball will still stun and damage you without warning from tiny melee range.
I'm not sure if I'm missing something, but it seems like a few values need to be tweaked for sure. Top two things I'd modify would be:
1) SPY to make it actually useful, like giving extra range or knockback (and charging quick enough to not have an enemy stun the player).
2) Boss telegraphing, the first boss boi needs to give the player more reaction time for whatever he is going to do next (and if anything, I'd personally enjoy him backing away from the player to use his fireballs more).