Heya, thank you for the comment!
Yeah I agree, this is partly because this one was part of a game Jam, so it's made from scratch within a month, and because it's the first one we made as a whole. I have also found out that it's very hard to get a good feeling for the gameplay vs the effort of making it :') So far we are very pleased to at least have gone through the whole experience of starting to finishing this minigame.
Your suggestions to make it a bit lengthier are great, thank you. :) Now that the Jam is finished, we are considering to take some more time to make this a bigger (actual) game.