This game has an interesting mechanic and I liked the puzzles, they were fun to work out. I also really liked the pixel art, good job on that! The way the frog gets ready to jump is really nice. You also made it a short and simple experience, and introduced each concept one at a time in a good manner.
My only issue si the movement. It looks like it should be a grid based game, but it is not, and it's hard to judge I'm going to jump. 3 Block jumps are super finnicky, and sometimes I'd touch water and die, sometimes I wouldn't.
A solid entry!