The camera movement from side to side is so fast and abrupt that almost made me puke, that was honestly the biggest negative of the whole experience.
The checkpoint where you get the double jump always spawns you inside an enemy, so you will start with two hearts if you respawn on that one.
Which also i do have to say, the HP upgrades staying unhealed when you respawn made them feel kinda useless, like they are just a momentary extra HP when you get them and nothing else.
When you are fighting the boss, the enemies that spawn will not move if you are far enough to the right, so if you destroy the two circles at the left when the battle starts, you can literally go to the right and beat the boss without moving again.
Run time: 14:44