Cheese method
Click Play to start the first level, then press F12 to open the console and enter the following:
var r = cr_getC2Runtime();
r.all_global_vars[13].data=1;
r.all_global_vars[14].data=1;
r.all_global_vars[15].data=1;
r.all_global_vars[16].data=1;
r.all_global_vars[17].data=1;
Return to the main menu and several achievements should pop. Now enter:
r.all_global_vars[5].data=5;
Click play (don't need to continue) and wait a second for the achievement to pop, then go back to menu and enter:
r.all_global_vars[5].data=10;
Again click play and wait a second for the achievement. Then enter:
r.changelayout = r.layouts['end'];
And the final achievement should pop.
Cheese strategy provided by Bobogoobo. 
