I really like the harp and the piano, their sound a little bit blur (and clear) so it sounds really soft.
The drums & the rythm are really excellent too.
But the sound of the trumpet is too heavy for me and breaks the beginning of the soft ambiance you induce. I don't like is sound.
I think this track could find its perfect place for any strategic game. Maybe in the loading time. Maybe in the menu or even in a small cinematic.
I don't think it could work for a 8bit like flash game. It sounds too profund, I mean this music deserves to take part in a great game. A strategic or even a (MMO)RPG game. I'm sure this could work really fine.
You should continue it, and if you lost your original, try to loop the sequences you got in your song. If you want to keep the trumpets you should maybe put them an octave lower, and add more blur to it. For the moment it sounds too high and agressive compared to the rest.
And if you want to play short notes with your trumpets try to use staccato instead. Keep your already patch for longer notes. I don't know if you see what I mean but I hope.
A bientot pour une nouvelle critique!