Potential! I would say get some voices in there, get a diversity of music or combat zones, get a speed up function that unlocks very early on, go wild with the buffs you select (like making a large variety of builds every time so it's not always the same thing). If this is the character design you're going for then I would perfect the design as good as you can. Probably have like a live 2d art of the characters so you could take advantage of the people's hormones lol. I could go on im sure