WebGL has a number of issues that affect the playing experience:

• Using aerial attacks in certain circumstances prevents the player from exiting the aerial attack state. Clicking out of the embedded viewport and clicking back in resets the state
• On defeating a boss, the game waits for an extended amount of time before advancing
• Title screen and level BGM playback breaks when tabbing out

We're compiling issues to patch in a potential update. For the smoothest experience in the meantime, use a downloadable version of Fruit Punch!