I'd like to nominate my own upload to the SP category: Literally Frozen Spring. Those 2 levels weren't too big an effort, but people apparently enjoyed them, so why not.

For the other categories, well, I shamefully haven't checked many downloads last year. Not enough to make a fair vote. I did enjoy Ozymandius and plusTetris a lot!

If I can find the time, I might check and play the final list of nominees once the thread is there.