Uhh, a few things here.
I felt like I was exploring and discovering things until I died and had to replay the same areas dozens of times. (This happened in Seiklus too, with its horrible instant-kill things.)
Since when does Seiklus have instant-kill things? Since when does Seiklus have
any kill things?
As far as getting stuck, there's almost always somewhere else to go, barring the very beginning, very end, and the second Grotto boss.
The gameplay is good. But, the graphics and music aren't. The graphics are at least consistent, though, even if I don't personally like the style. However, the music is all bland, painful MIDI (at least, I didn't recognize any non-MIDI instruments), and it feels pretty slapped-on: like a placeholder for better music to be made for the game later.
Personally, I really like the way the graphics look, but I'd agree on the music. I never liked MIDI (does anyone?), and a few of the tracks are pretty poorly made.
Also, I felt the heart barrier things were pretty cheap. Forcing the player to replay the same area until they can get through it without getting hit once in order to advance is really irritating.
Ugh, this has been covered so many times (though not on this forum, obviously).
You don't need to trigger a single heart gate in order to beat the game. The only one you should feel obligated to get through is the StoneCastle one with the jump upgrade, but honestly, it's very easy. Actually, I never had any trouble with any of the heart gates. However...
...this brings me to my next point about the game: I think it's really, really easy. Laughable, even, on Simple and Normal, and only vaguely challenging on Difficult. I found it pretty hard on my first playthrough, but that was on Masterful. Currently I'm only likely to die if I play on Insanity (though obviously
very likely, but...).
Other people seem to find the game very hard, and I think that probably keeps me from understanding what other people say about it. I'm not sure why I find this game so easy because I, as a general rule, suck at games, but oh well.