Trixie turned you into a pony, but her spell will only last for 3 days and 3 nights. During the day, you can go see her to change your race (pegasus, earth, unicorn), but keep in mind you can’t change while she’s asleep. Since some scenes are only available at certain times of the day, it’s important you plan your actions carefully if you want to have your way with as many ponies as you can. Because yes, that’s the objective of the game. Of course, this guide has spoilers (duh) about which characters you can have your way with. Since the 1.5 version has many more scenes, you’ll have to play the game more than once to play them all. Luckily, many of them are accessible from the game intro in the “Less bullshit mode”.