Suggestions:
More Tooltips. I.E:
- What does each note combined do?
- What does each upgraded version of the last note power up do? (For example. Circle Shot IV)
Maybe a new unlockable 5th note!?!?!
- Could maybe be the strings?
- Maybe is a projectile from the Lazershot?
Maybe sound alterations/switching (The arrows on the notes sides):
- Could have a tiny alteration to the attack itself. Like instead of the yellow note just exploding it'll do 3 tiny but less effective explosions.
- Could do nothing else I couldn't think of anything more.
Maybe a power up that speeds up your bpm?
- Could reduce damage on your attacks.
- Could spawn more mobs and said spawned mobs can be more powerful.
- Could be a whole new mode that could be labelled "Fast Rhythm Mode".