to play this preview just play with the variable (and shoot the scratch cat.)
this is an engine (so you can remix it to have the blocks) easy to use changelog : 0.1 : launch 0.2 : added drag and changing the mass role (now the drag do it) 0.4 : added addforce function 0.7 : Added writable addforce function and removed non-writable boolean addforce function 0.8 : changed the name drag to max speed and changed algorythm 1.0 fixed several bugs and finishing all (like adding thumbnail.) and yay! the project is finally not beta! 1.2 : added repeat addforce for always repeat control (ex.: to make an platformer)
