Jumpar.io is all about jumping strategically and smashing your unsuspecting enemies. You are a squish blob and you are able to hop around the maze map, climbing walls and structures. You must smash other blobs to grow larger, thus opening up other parts of the map for you.
Use your W, A, S, and D keys to move and jump around. You can tap W or Spacebar multiple times to double jump, and you can also jump from walls to get into difficult spaces.
Always try to stay above other players, as this will prevent you from getting smushed as often. If a player is much larger than you, you will have to jump from much higher up to smash them, so time those high jumps well!