To be honest I didn't like this game so much at first, but it kind of gets better as you play on. IMO the whole shop grind and initial handicap aspect takes away from these sorts of games but I understand why you do it -- because some people like that sort of thing I suppose. But I'd rather go in guns-a-blazin' from the start.
I do believe all medals are obtainable, despite "Untouchable" and "The Big Combo" being such rare unlocks.
Untouchable -- well obviously don't get hit at all. Only one person's done it. Particularly aggravating as especially any of the bosses will easily hit you since you gotta get so close to hit them, and you could be far in the game, take one heart of damage, too bad start the game all over if you want the medal.
The Big Combo -- if you're keen you'll notice this isn't possible in most levels because even if you try to drag it out, you're gonna finish out the level before you even get close, and once you finish a stage your combo resets (would have been nice if it didn't reset between stages though). One possible place to do this is the first boss. Kill a bat, wait until the combo counter is almost up, kill another bat, etc... and if you've waited like this by the time you kill that 4th bat, just about the time your combo counter is almost up, another group of four arrives. But very easy to mess up the combo here, but yes here's where you'll do it if you want that medal.
Excellent game! Very new and interesting concept - I, personally, have never played anything even remotely similar to this game, so big points for originality! The eldritch/forbidden legend theme is always fun, too (but that's just me)! :D
There are a few things that irk me, though:
For one, I ran into a quite serious bug, in that at some point, I apparently "dashed" into a side wall at just the right velocity, and hit at just the right spot, I clipped INTO THE WALL ITSELF. My Heart-guy-character (lolwut) was then stuck in his/its "hit wall on the right side" animation, and he just powerslid down, right through all the subsequent levels... Yes, I really mean through the levels. I had no choice but to refresh the page. Pretty big bug, if you ask me; so I would advise you "squish" it, if and whenever possible. ;P
Another thing that may or may not be a "bug", per se, is that the Key of Life powerups don't stack. That's just the lazy, casual gamer in me complaining; that may just be a design choice that I simply don't agree with. Ergo, there's really no pressure to fix that one.
Sorry I can't be of more help - both in terms of the specifics of how I encountered the first bug, and in terms of giving an overall limited review.
In any case, though, kudos on the pioneering beyond the the traditional "dungeon crawler" genre!
Huh, good game I thought, but kind of strange...
Tough game, the electric stage is ridiculously hard for trying to conserve energy and the last fire stage (before the boss) is pure fire walls. The difficulty is high on this game but I can see myself at least beating it on medium. Also, it seems as though I didnt get the medal for beating it on easy.