The stuff of increasing/decreasing the damage on SUPER needs to be changed.
It can reward LUCK by just mashing buttons during the SUPER.
There are 3 types of that stuff: small increase/decrease, medium increase/decrease and big increase/decrease. Another problem with this is that the reward is VERY small. It's like a 3% reward. lol
I'd make these changes:
1 - make it reward SKILL by making when you mash buttons RANDOMLY you do NOT get any reward.
2.1 - small increase/decrease - when you press 3 close to the perfect time = 2% reward
2.2 - medium increase/decrease - when you press 3 very close to the perfect time = 4% reward
2.3 - big increase/decrease - when you press 3 in the perfect time = 6% reward
Make 18% the total of big increase/decrease.
One example: Green Arrow's super - it's 3 times that you can increase the damage or decrease the damage:
1 - when the arrow explodes
2 - when he hits the opponent with an ice arrow
3 - when he lands onto the opponent
if you press 3 in the PERFECT times you can get all big increases/decreases. Making a total of 18%.