Is it worth to buy ImpactJS?

Yesterday I came across an interesting JS engine, allows you to make 2D and 3D games.
Here's the question: it interested me and I want to buy it. Is it worth it?
Knowledge of JS,but I as a novice when you create the game will require both the design and code.
Is there in this engine class? What difficulties can arise?
2 answers
July 8th 19 at 12:26
Your question is incorrect. What to say to a man who wants and has already questioned the choice?
Buy or not, the problem will remain. If you have no knowledge and desire to study it, time will definitely be spent in the shuffle.

There's a reference to "Docs" and its more than enough to understand their strength.
There is also a "Games" to understand where and how well it is playable.
July 8th 19 at 12:28
Frišnyh version is? Download and study. If not, then maybe you should look at the options for engines having frišnyh Assembly also. And as the cat in the bag...

Offhand Phaser, Blend4Web, Construct... But in General here is a list and there's rankings.

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