Sanmoy Ray recently contacted me about his puzzle app game Zen Triangle. The objective is to fit the pieces into the tray.
I've done a couple thousand of these over the years. They're classified as packing puzzles. I'm not a big fan of the genre. At least anymore.
Zen Triangle has over 350 levels. I have no internal need to solve them all. I did the first dozen which are really easy. Even for a beginner, I think they're too easy. I was not able to access the harder puzzle levels because I didn't upgrade.
I can definitely see some young puzzlers liking Zen Triangle. The graphics are good and it's easy to rotate and flip pieces.