i liked the game and found the challenge fun.
however, one or two checkpoints would have made the experience better, i think. although if the moving platforms weren't that fast i don't think you would have needed any checkpoints at all, because the game is actually not that long and in my opinion those are the only obstacles that can be really frustrating.
i didn't really understand why the oranges were there, maybe they were collectables? like the strawberries in celeste? in which case it would have been nice if you indicated how many you collected at the end of the game, like: "you managed to get 5 out of 8 oranges!" or something like that.
overall it's good considering it's your first game jam and you made it in only 2 days.