Came here from Everflame, I thought I'd do you the favour of trying your game too as you did mine! Let's start with the positives:
I think your game did exceptionally well with the singular mechanic of touching bombs. You center your entire puzzle game around this mechanic and made a scoring system based on getting as little bombs as possible. Very nice! And the game is quite well polished because of the simple system. I love it!
I like your slow introductions of new mechanics. As is with puzzle games, its difficulty is well defined by the number of mechanics it has - as such, I think you did it justice here. The yellow and black goo caught me by surprise but I very quickly learned what it did. All in all, I think you did the difficulty really well!
Some things I thing could be better:
Might be a bug with the game, but I only wished that when you start the level, the fuse wouldn't start immediately. If you had already coded that in, then that's good - it's a good feature especially as a puzzle game.
The exit could be made more clear. The arrow signs point them well but I think if you at least made the tilesets on where the exit should be a different color, or extremely obvious, could just add a little bit more touch to the final product.
All in all, I like it actually. Nice game. Like a good solid 7/10 as a prototype. If you give it much more love, some levels, maybe a custom editor, more music and sound, more art - I can see this becoming a nice small mobile game for $0.99 - y'know.
Cheerios man!