As prior people have mentioned, grabbing on gems seems to be a bit of an issue. Didn't really become a problem till level 9 where a gem is right in the way of a wall you should grab onto. I do like the general mechanic of swinging around using your frog tongue however it just feels a little slow for my taste. The music and sound effects were pretty nice, but the frog honestly looks more like a snake than a frog. The tongue also not sticking to the pixel art design is a little disappointing.
Honestly I would love to see this game expand into more levels with more complex art and a faster swing. Seems like it would be rather fun.