Neat set of minigames. I like the variety of stuff to do. Each of them too me a little while to figure out. They're a little rough, as you wrote, but they're full of good ideas. Great time waster.
The first one was fun, but I felt the bars took too long to complete. I liked how the stuff kept coming, as though the project kept getting bigger. The piano was great. The second one took some time to figure out, though now I know how to play it, it's pretty fun. The third one had lots of upgrades to buy. I appreciated the goals. Once it was balanced, there wasn't much to do, whether the games sold well or not.
I see that there three made this game and there are three minigames. I'm guessing that you each made one? Either way, well done. This is a very creative entry.