Just a heads-up: I'm writing this review on 15 October 2014. As of today, Melody's Escape is still in Early Access, so this review might not be accurate if the game undergoes more development.
Melody's Escape has heart, and its base concept is so simple that I'm surprised at how challenging it is. The problem is that a good portion of the challenge doesn't come from the gameplay, but from the interface and the bugs.
In full screen mode, the game doesn't register button/key-presses worth a damn, so I played it in windowed mode instead. It works much better in windowed mode, but the timing of key presses still feels somewhat arbitrary. This is most notable in sections that have evenly spaced single notes that, by rights, should have a regular 4/4 beat, but even tapping right along with the song yields a hit only 80% of the time at best. This includes Relaxed mode, where (supposedly) you can LITERALLY just tap one button in time with the song for most of the prompts. I get the distinct impression that this is not because the prompts aren't timed right, but rather, the game still isn't registering all of my key-presses correctly.
In sections that mix "button" prompts (orbs) with "direction" prompts (obstacles), the game tends to ignore between 30-50% of all my "direction" presses, even on difficulty modes where the directions and buttons are interchangeable (The lowest two difficulties). Additionally, when two "long-note" sections, which require you to hold the button, are back to back, the game tends to ignore my button press on the second prompt. For most of these issues, I find that if I press the key a split second early, it tends to register more often, but what is the point of a rhythm game if you have to force yourself to ignore the rhythm in order to play?
On top of this, the process of respawning after you die is not very forgiving. I find that most of my deaths come in twos, because Melody will fall down, reappear, and immediately trip over something else because the game isn't ready to register key presses yet, or something.
My last major point of contention is that the difficulty level of the game, even without the bugs, is off the charts. Personally, I can't imagine how anybody referred to this game as "relaxing". Even some of my most drifty, relaxing music was face-meltingly difficult at anything other than "Relaxed" difficulty, which just requires you to tap away at the same key for most of a song. I don't know if the devs read reviews, but I'd suggest changing, or implementing a setting to allow the player to adjust, the speed at which the stage goes by (or the speed at which Melody runs, if you prefer). A follow-on suggestion to that would be two sliding scales of difficulty. The current one changes the fundamental game mechanics so that you either have to use one button at a time, four buttons, or four buttons AND four directions. I'd like to see a second difficulty setting that simply lets me adjust how frequently the prompts appear. Only having to press the B button doesn't help me if I have to press it 16 times in one syncopated measure.
Finally, and this is NOT a complaint but a suggestion, I would really like to see the "AutoPlay" mode be able to play more than one song consecutively. If you're going to play it up as a visualizer, why not let Melody just run her way through an entire folder?
If the timing/sync issues could be resolved, and if I could play it fullscreen, I'd probably give the game an 8/10 or 9/10 even with the insane difficulty level. It has style, the concept is simple and proven, and honestly, who doesn't like games that respond to your personal music library? As it stands, though, it gets one point for style, one point for letting me use my music library, one point for having polished visuals (or, if you want to be brutally honest, an aesthetic so simple that the visuals couldn't be anything other than polished), one point for the solid concept, and an extra point for the music thing (because I REALLY like games that let me use my music library), for a wobbly 5/10. I look forward to seeing where this game goes. I do recommend it, but I also recommend not expecting a perfect game. It's still in Early Access and I like it, but it definitely needs work.