Got softlocked here unfortunately. That aside though, great little game. Has a pretty simple mechanic, but you've made use of it beautifully.
I think the best thing about this game is how well it's paced. New obstacles are added into the fray at a pretty steady pace ( like the flies and the bubble guns ). It's a shame that the game softlocked since the water also seemed like a very cool idea. Effectively acting as sort of a timer.
The presentation is great as well overall. Both the visuals and the audio were just pleasing to interact with in general and the frog just looks adorable. Level design as a whole was also pretty solid in how each level felt like a puzzle when it came to getting from point A to point B so to speak.
Unfortunately, this is also where I think the game's biggest fault lies. There were a number of times where the tongue didn't pull me to a spot that I thought I could get to, but then I tried it again and it worked. There were some spots where I just couldn't get to because I guess they were just too far from the frog, but because this wasn't really consistent, I was a little confused in some places. I also think the game demands platforming which is a little too precise for what the controls allow. The prime example would be the bubble puzzle right before you get the phase ability. It feels like it's tuned more for when you have the ability as opposed to before when you don't for how precise it requires you to be
The above issues that I pointed out might just be skill issues from me, but I felt it's something worth noting. All that aside, this is definitely a cool entry. Great job on this