I'm taking another stab at this "getting help on the forum" thing, since my last attempt went rather well.
My problem with the Match-3 game now is getting the items in the grid to behave properly after matched item groups disappear. I decided to set all the grid items to Solid with Platform behaviour; that way I figure it they should stack nicely on top of one another, and when any items disappear the ones above should fall down to fill in the gaps. Problem is, a lot of the time the items above the ones that disappeared shoot off somewhere. Sometimes they come to rest on a platform above, but a lot of the time they just disappear into never-never land. I'm guessing there's either a bug in the collision system or something I haven't accounted for.
Could someone please have a look at my cap and tell me if there's something obvious I'm doing wrong? As of right now, only horizontal groups of 3 or more disappear, and you have to click on them first. If you run out of horizontal groups to click, pressing the 'r' key will reset the board.
If I can't figure this out, I'll probably just slap together some events to make individual grid item sprites slide down if there's empty space underneath. I was just hoping to use the Platform behaviour because it looks pretty slick and it's (theoretically) less effort for me.