izigame.me

To put it simply, this game is completely insane and I literally couldn't make up this games plot if I tried. Every route was a joy to play, I got far more invested in a bunch of png pigeons than I logically ever should have, and the ending made me legitimately emotional, though didn't quite make me cry
Unfortunately the game's main gimmick is also it's main turn off. Most people I've talked to think that it's just a joke game about pigeons, and doesn't offer anything of actual substance, though after playing I would be inclined to disagree. However, you are never really able to "unbird" the characters, or see them as humans with bird avatars, since the plot relies on them being birds, and changing that would change a large section of the final route
The other major hurdle is the fact the game as a sort of "animated sitcom" effect, where the rules seemingly change based on the joke they want to make. For example, the birds are able to ride scooters and hold things with their "hands", but they are also still bird sized, and run by "hopping around", and the Anghel route in particular is just complete nonsense without playing the BBL route.
The game features 14 endings, split across 8 routes, a 9th somewhat hidden route (Anghel), a "bad ending" which is unlocked by failing certain routes, and a big final route called BBL or "Bad Boy's Love", which requires you to have obtained most of the main endings, and is entirely separate from the main ones. Instead giving you an option to "fulfill a promise" when you go to start a new game (saying no takes you to the main game, and while saying yes locks you into the BBL route)
If you're looking for a funny, but still well written and at times surprisingly emotional Visual Novel, and don't mind the fact everyone are birds, this game is simply amazing, if you want a more grounded story, dislike vague rules and over the top absurdity, or are just unable to connect with non-human characters, you may want to skip this game