Normally not into dating sim-esque stuff, but this definitely comes off as a parody so I'll accept it.
The puns are funny. Both the innocent and crass wordplay amuse like they're supposed to, even if the general experience isn't one to laugh out loud about.
The female frog protagonist is actually rather endearing. Generic visual design, but for a small freeware project that's fair. The sound effect for her shooting her tongue out is cute, and sounds distinctive from similar high-pitched "tongue" sounds from other cutesy characters; I could tell this apart from Yoshi for example.
The gameplay is what it says it is, so the slow pace makes sense. I like the mechanic of actually charging up the tongue, including the animation both for the protagonist sucking in her breath, and of the tongue itself when it lashes out.
The only thing I'd recommend changing is adding an ending after each fish, and "fish", has been caught. Maybe have the protagonist in an MS Paint "The end" screen with a reverse harem in her kitchen or something. Other than that, an impressive and amusing pastime/skill-sharpening/self-teaching project. Credit for making, and for sharing.