I really like the drop down effect in the beginning and I think you should add a background. Maybe add some power ups? But other than that it's great!
It's really cool! Like @Niftynia75 said, the beginning drop effect is neat.
Maybe you could add platforms with multiple holes, just to switch it up and make the user choose? Or you could add coins that you collect that add to your score/can be used to buy things (maybe power ups or color schemes)?
I think that it is really cool and agree with what the others have said! :D
Hi Candycane,I am 8 and I like swimming