Stacky Run is a super casual game you can pick up and play at any time. There are no complicated rules, just islands, bricks and the long gaps in between.
Run around each platform collecting bricks and diamonds. The bricks stack up behind you, and you need them, because the bridges between the islands are built from bricks. When you run across a gap, your bricks are laid down one by one to make the path. Run out of bricks halfway and you will not make it, so collect enough first. Your goal is to reach the end safely.