Use arrow keys to control the Mach 5, space also brakes. If you tap the break while turning at speed your car will start to slide... If you can control it then you can get round tighter bends at speed. Use the Mach 5's advanced features! (the A-G keys on the keyboard) Try to beat your best times! Watch out for Duggery! He doesn't play by the rules.
Credit to griffpatch and TTR2. Speed Racer is owned by Tatsunoko Production. update 9-1-2024: All special functions now work, though they don't do much in game play. Pressing B will enable the Grip Tires, which add some extra speed. Pressing G will launch the Homing Robot, which you can't use again for a while. New sounds and music from the Speed Racer Shockwave game. Duggery has been added, after a bit of time you can encounter him instead of the normal cars on the track, and he'll randomly say a quote. Credit to Random-Projects23445 for the assets they made for and used in their remix.