Enjoyment: It was fun, if brutally difficult.
Concept: I love the idea behind this control scheme, even if the execution is a little clunky. The jump gauge, plus the aiming, plus the tongue swinging make for a really high-skill moveset.
Presentation: Good pixel art, especially the frog and the background. Seriously needs a tutorial, given all the different mechanics. Love the way the frog bounces as he lands. Catching a fly mid-flip, then rolling as you land just feels so badass.
Use of the Limitation: I couldn't get past the swing target over the water (those are so hard to hit!), so I'm not sure how it ends. There did seem to be checkpoints though, which kind of feels like cheating...
Overall, great ideas, would love to see the difficulty tuned a bit. You have a really nice high skill ceiling, but you need to lower the skill floor.