my only complaint thus far is that when changing numeric values like tempo or whatever it tends to be overly sensitive. I have to go back and forth often missing the exact value that I actually want. Maybe slow it down a little?
It does seem kind of sensitive. I had trouble placing notes because it'd scroll down too fast. Also deleting notes is a little weird. And I almost have to hold start for it to start playing.
I'm sure these things will be calibrated better as development continues. Speaking of which, who is developing this? It's good to see other GBA trackers emerging since M4G seems... dead.