Gameguru is a interesting engine. I actually own it but never really made anything with it (Far too basic for me)
Most games made on Gameguru are Asset Flips. Games that are completely made up of premade assets. They are usually made by younger, inexperienced developers or random nut jobs that want to make a quick buck.
I've never actually seen a good game made on Gameguru (I.E original content, gameplay , e.t.c) though its not impossible.
Gameguru is a very clunky engine. Even with a brand new p/c, it runs like s###. (12 gb of ram) though something could be wrong with my computer.
All in all, I'm not a huge fan of Gameguru games. But if you can make a decent game in it...
then I think you get a gold medal LOL.
Have a nice day :D
~Star
(This post is not meant to be negative)