Add gravity

Gravity is one small trick — a velocity that keeps growing — and this build layers it up across three short parts. Part 1 gets a dot falling and jumping. Part 2 swaps in your own sprite and handles the offset so its feet (not its head) land on the ground. Part 3 uses sprite flags so your character stands on the platforms you painted in the Map tab. Each part is a complete program you can send straight to the editor.