Here is the compilation of the Puzzle submissions for Puzzle Innovation Contest. Do have a look as some of these have been selected for the World Puzzle Championship and will appear in the IB in a few days.
Maybe if you turn your head to a different angle? Squint a little? Tetromino puzzles are easier if you're allowed an extra shape... ;)
I suspect these pages are unedited, as originally submitted by the authors. So if it makes it into the WPC then they might choose a different set of possible shapes...