I'm impressed that you made so many games!
I think you could improve the pacing of the musical arrow match game if there was more time/distance to see the first arrows of the game, but have a faster song overall, so that the difficulty is less at the start, but greater overall. Currently, the only hard part is that first set of 3 rapid arrows.
The smashing game and the horizontal shooter game would feel better if the player's attacks were more rapid. You might have to increase the enemy rate to compensate, but it would just feel better to control if I didn't have to wait so long for my character to do stuff.
The stalactite dodging game is very easy and feels out of place among the other harder games. I think it would be appropriate to increase the speed and complexity of obstacle patterns.