So far so good! :D Simple graphics, but the story's followable! Just not really sure what's happening in the last frame... high five moment? Flying into the sky...?
Regarding speech bubbles: it's good practice to have them in the order you read, so you don't need numbers to tell the reader which to read first. If you lead a speech bubble from one character you can place it on the opposite side of the screen to if they're in the wrong order by default, so the flow of dialog is as smooth as possible.
Story-wise it's not bad! Looking forward to part 2.