I didn't really expect a genuine Commodore 64 game here!
The gameplay is very simple, the only thing you do is jumping from one lily to the other, by holding a one button for different amount of time, to achieve different amount of jump power. It is very easy to play, and playing itself can be fun, however, there isn't much content in the game. Now, I don't know how hard it is to develop a game for C64 these days, so I'm not going to be too harsh on the lack of content, but that has to be considered, should you continue the development of this game.
However, despite the C64 limitations, I must admit, that the graphics and sound effects in this game, are hella well done! The main menu image, alongside the scrolling backgrounds, look very pretty, and the sound effects give a nice feedback as to what is happening. The music, is also great! It doesn't get annoying, is nice to listen, and considering this melody has been created for this game, I must say, you did a great job!
Perhaps the gameplay isn't the finest, but everything else has been well crafted! It is a very good game, and even if it wasn't made for the Commodore 64, it would still be great!