I uploaded my entire playthrough of the alpha demo.
My impressions so far,
It's fun. It's basically Chrono Trigger but Mario RPG button timing mechanics. If you press the Confirm button as an attack lands you do additional damage, Also if you time the Confirm button before receiving damage you raise your guard and reduce incoming damage. The Girl character has a Boomerang special move and if you press Confirm the second it returns you immediately throw it again for a double attack and can continue to do so until you miss the timing. Also the Boy has a Fire Projectile spell but you mash the confirm button it gets bigger and bigger and does more damage.
There is an interesting day and night time switching mechanic. The World Map is basically similar to Chrono Trigger. Haven't seen any dual techs yet, but I guess this is something they are saving for later on. I haven't quite figured out the different symbols that sometimes show above a target in battle and what they do or represent. I guess this more information will become available over time.
All in all for a super early demo it shows incredible promise.
Skimmed through, music is great. I can see that boomerang move getting a bit tiresome after a while though.