No energy bars, no ads popping up, a developer that understands the micro transaction concept. But that's what I expect from the Spiciest of Horses, being a Horse myself... also a game developer, tool dev and character TD mainly though.
Also love the graphics and music.
Clearly a lot of developers don't understand how to properly implement micro transactions. If you want to go that route, anything that can be bought through micro transactions should be available in game normally, either through earning or paying in game currency, or to speed things up for those who don't want to wait can pay for, but don't do this for game time, or at least drop the time it takes to get more game time.
Seriously I shouldn't have to pay to unlock recipes, it could be that getting to a certain level or using some amount of in game currency with the option to pay to unlock early.
I don't see the circle as a problem, but the difficulties are messed up, easy is maybe slightly above easy, but when you get to normal most of the songs are impossible and I think it's mainly because the area that you hit the bubble in, because when the bubble is fully in one of the circles it won't work, it has to be partially in for it to work otherwise you miss the note... insane well those are completely impossible to do.
 "Game of Thrones Ascent"){kind=icon}
 "Road of the Dead 2"){kind=icon}
 "Akaneiro"){kind=icon}
 "Ninja Slash"){kind=icon}
 "Swords & Potions"){kind=icon}
 "Punk-o-matic 2"){kind=icon}
Us horses have got to stick together ;) Glad you're enjoying Akaneiro anyway, stick around for more awesome content and updates in the future !!