Of the two example games that come with the engine, skiing is 113 lines long and snake is 158 lines long. Both include comments and don't make any attempt at a brief style of coding, so their lengths seem reasonable to me.
What games have you seen that you feel are too code heavy, written using this engine?
"Code heavy" of course in a relative sense. You can definitely make a snake game with the same aesthetic in less that 158 line, and you won't need to carry along the engine. I would also argue that the plain javascript version will be easier to understand as you will not need to understand what the engine is doing.
What games have you seen that you feel are too code heavy, written using this engine?