Progression's... not really that slow, but not at all interesting or fun. Without the premium currency upgrades, and with a prestige option that really doesn't feel like it has any impact whatsoever, it's not exactly keeping me interested. It's a nice idea for a game, but there's not enough to it to keep me playing.
If there are other ways to get premium currency that I've missed, my bad.
Some upgrades to speed up transmutes or allow multiple transmutes at once would be nice! I'm still hoping for an option to turn down graphics or something, game really slows down this low-end laptop I'm on so much I can't play it as I progress.
Some sort of graphics options would be nice. A lot of moving objects at once as you go further along, and I am often playing on a really crappy laptop meant for work. Also a bit short, but you already know that! Looking forward to where you go from here :D
Well, there are bugs.
The "New upgrade" sign pops up constantly, even after getting ALL, and I mean all, upgrades. The turrets should explode on impact, at least those meant for it, and the air support should be stronger. In addition, the game got laggy when there were a lot of enemies on-screen.
Not bad at all. I don't really have a lot to say about it. I guess you could add a bonus for clearing the board. Show what the colour of the next bubble will be. I like that more colours are added as you progress.