User Summary Vector Ace is an Android version of a racing game in the vein of the pencil and graph paper game of Racetrack and its derivatives, Bolide and Tacara. The game uses vector movement with Newtonian physics: move too fast and you may not be able to slow down in time to avoid the wall. Can be played solitaire against the computer or 2-player hotseat. Comes with 7 tracks of varying lengths and difficulty. Expert mode increases the challenge by having the players pass through particular coordinates for extra points.