Mr. Do! Run Run (released for the Amiga by Electrocoin in 1990) is an action-arcade puzzle game and the fourth instalment in Universal’s classic Mr. Do! series.
 
Unlike earlier entries where the clown burrowed underground, this top-down title requires Mr. Do! to navigate multi-tiered platform levels populated by pursuing monsters. As he moves, he leaves behind a physical trail line; looping this trail back over itself encloses sections of the playfield, upgrading dots into higher-value fruit and recharging his primary weapon—a bouncing crystal powerball.
 
Players can clear screens by collecting all items or defeating enemies, either by hurling the crystal ball or by triggering hazard logs to roll downslope and crush foes. Collecting specific items also spells out the classic E-X-T-R-A bonus. Blending elements of maze navigation and strategic territory-claiming, the Amiga conversion faithfully brings the colourful 1984 arcade experience to home computers.