What would you change about this comic?

On the 2nd page, the first 2 panels could definitely just be combined into one more detailed drawing (you can even exaggerate the tired face more).
On the 2 panels after that that (the "aaaah" and "I'm finished), the "aaah" panel could definitely be much smaller and let the "I'm finished" take a lot more space to really accentuate the relief. They don't even have to be on the same line, the smaller panel (aaah) could be just a smaller square on top of the big rectangle.

In comics, the size and disposition of the panels really helps create mood. If they're too balanced the action can become too stiff and not dynamic enough! Don't be afraid to make everything a little more dramatic because it helps convey emotion better