T-Gotchi is an interesting experiment, combining the nostalgia of Tamagotchi with the question of what would it be like to take care of a human with their own wants and needs versus an anime creature. Beyond the Tamagotchi staples of food and hygeine, your T-Gotchi has her own emotional well-being which must be nurtured. As the game hints at, we will see T-Gotchi in some unwell mental states and have to deal with that based on our choices as a player. Ultimately a very interesting game and a thoughtful take on the 'digital pet' genre.
My main critique would be the game says "your choices matter!" but they ultimately do not. Every game ends with a type of cruelty to the T-Gotchi. Unless there's a secret ending I missed past the 8 the game shows me, I left feeling not-so-great about the time I put in with T-Gotchi. Cruelty is an interesting narrative device to elicit a reaction in a player, but I think when the only option is cruelty for every single route, the cruelty becomes less impactful. The player grows numb to it. I can't speak for others, but I played through all the endings hoping for one where maybe I could remove T-Gotchi from her cruel fate, but there was no salvation in the end. After getting 7 of the endings, the 8th ending was just a declaration that the game was complete, which let me feeling a little deflated. Perhaps that's the nihilistic lesson the creator intended, but I've experienced a lot of cruelty in the horror gaming genre, and it doesn't do as much for me without a little light. Overall, the game left me wanting more—especially since I would not normally pick cruel routes (AKA 'genocide runs') if I could avoid them.
Unless I missed some lore, it would have been interesting to learn more about Daddy, or wanting to know more about the figure that speaks to you between games (perhaps he IS Daddy?), or give T-Gotchi medicine after beating all the other endings, or be rewarded for not spying on her during her showers. Or even just somehow break her out of her 'jail cell' of the game itself in a final ending, where once she's free the game is over forever (a little like what happens in Oneshot).
Ultimately I enjoyed the journey and the experience of the game and say it's definitely worth the $5--I just wish I was able to play the game in a way that did not make me feel like a sadist for trying to also be a completionist with the character's ultimate well-being in mind.