Great job making your first game! That is a huge accomplishment and I hope you keep making more.
Some constructive criticism:
- Transitions are rough, the camera snaps into place when the player moves out of bounds. For this to work the camera movement should have a logic that can be followed. I.E. the player character touches bottom of screen and transitions to a new screen, the player character should enter from the same X axis at the top.
- Sometimes the camera follows and other times it snaps to a position. Pick one so it is not so jarring