Like what kind of gamemodes? did you make?
None released, or even publicly hosted.
I made a halloween themed gamemode, where one person was a nearly invisible player, the 'ghost', and had to find and kill the other players within a time limit, in a small, dark build. Sounded fun to me and the couple people I described it to, but after hosting it with people it turned out to just be a rather boring tag type game. Had some ideas to make it maybe a little fun, but it didn't seem worth it.
I also made basically a remake of Transformice, but with the limited physics of Blockland its rather dull compared to the actual thing. Though this is far from finished, it may have some interest if I change it around and add different things.
Though they weren't anywhere near great, they still served as experience, and I was able to experiment with some things I hadn't done before.