Well, this one took a bit of work to play. I ended up downloading the game and then using the same C64 emulator as your in-browser one, but yours was quite buggy for some reason.
Gameplay
Nothing outstanding, as far as one-button games go this feels pretty standard. Sometimes the jump hitboxes feel a bit small.
Graphics
Well you built graphics from scratch and they look better than my own game, so I don't really know what to say... it's a bit of a shame that the sky is more detailed than the water (which is the main part of the game) but I assume that from a technical standpoint filling with a single color was much easier than drawing a sprite over a background.
Audio
On itch it was poor quality and quite noisy, but after loading the game "properly" it worked fine. Amazing soundtrack! I liked the sound effects for the jump, pretty simple yet they give a great feedback
Innovation
Well this one gets 5 stars. Congratulations on making a game that good from scratch for C64 (please tell me you ran it on an actual C64)!
Theme interpretation
Again, nothing too fancy on this side. I notice a number of frogs this year.