Nice little concept with fun difficulty and good art style. That you can wrap around the screen but the enemies can't works great for strategy, and is really helpful when you run out of directions to move in but the power up you need is on the other side.
Once I realized that the large hitboxes of the AB buttons basically made it only a matter of time until I would lose them, I started using their powers much more generously instead of "saving them for the right time", which made the game more enjoyable actually.
When you get to the joystick boss it seems that it's pretty tough though, when your movement is limited and you have no means of attack. I couldn't really tell if the joystick was also losing power over time like the other enemies, might have just missed that indicator. If it doesn't lose power over time, then maybe a few more drops of the attack button would be nice :)
But well done overall