This was a good break from the tradtional RPG types, but it lacks punch. There should be rewards for getting a crossroads (make a horizontal and vertical match using the same elemental), and the rare but possible 7-in-a-row. Also, we don't get to see the profits from just matching with the element upgrades.
To kill the Ogre Easy, use the finesse combat style to dash up to his sunny face. Then chainsaw his ugly yolk off (Finesse Style, click and hold the mouse then move it up and let go to perform an aerial dash, you can do this repeatedly to position right next to the ogre's big ugly head, and then click his head as many times as you can). Lol breakfast joke. + to keep this comment alive.
PROTIP: Use as many discount coins on a firearm that you expect to keep for the rest of the game, like the gravity gun, because you can then upgrade once AT A LOWER PRICE TOO. I don't know what this does to recycling and modding but...
ONE OF MY FAIRY DUSTS WAS A DUD!!!\
No really, I used it in a Guardian fight, it made a 24 hours something-something sign come up and I didn't refill my skill points, then I used another and it worked.