Dude, great game. Loved it.
I would really really like to be able to grab blocks out of stacks, like the extreme left and right.. I felt they stacked up too quickly for me and I wasn't able to push matching blocks towards them to bring them down... buuuut I think that's mostly a skill issue on my part :D
Yeah there's some physics things, some collision things - but - you put a heck of a lot of time, effort, and energy into this and it shows. Neat idea, well executed.
I'm aware that you spent a lot of time researching butterflies and sourcing graphics for them, but they were a little underutilised .. I kind of stopped paying attention to the butterflies and was more worried about jern's smug face being hit by blocks! But still a neat idea.
Nice work man ;)