I do my  best to try out every engine I come across, especially in the 2d space. I have a website dedicated to that fact, whic h I wont promote here as that wouldn't be very cool. That said, I can't justify using the 40 bucks I don't even have to try this one, despite how cool and unique it looks. I will make no judgment calls as far as if the price is fair or not, though, I will point out that Game Maker Studio is often available for this same price. I wish you the best and I hope to have the spare cash to be able to try this out one day. Good luck!