I don't see much room for anything to be developed on ARK before they release the ARK-VM. I believe this will be a big hit that has the potential to overtake Ethereum, as long as the team does good with marketing.
The team is doing great with development quality and speed, what we haven't seen much of yet is their marketing strength.
The YouTube commercial was of high quality and almost like a Hollywood movie commercial, so I have high hopes for when they'll focus on marketing!
My suggestion to ARK would be this: Create your own decentralised game on your blockchain or pay another developer to make one for you, your VM success (and your whole project's success) will depend on the success of your first apps, please make sure your very first one is a great success!
I think you and I are still not understand this ArkVM thing, yet.
After reading the post below and some understanding doubled1c3 explained then we add how Phantom done the airdrop using Ark, it is a different ball game out there.
https://www.reddit.com/r/ArkEcosystem/comments/bjenyg/what_happened_with_aces_project_and_is_ark_movingArkVM or smart contracts would call something like, "sidechain plugin" or "plugin smart contracts". It perform the same thing but in difference way to get it done. We all should know Ark purpose is ease of use and no bloat, seem the Ark team are working hard to achieving their goal.
This app you talking about I think it will be easy to have it done via plugin. Ark plugin is working now or should be working soon I think.
To sum it all up Ark is a huge Ecosystem, Enterprise blockchain no one fully understand at this point. I hope they would incorporating Ark token into this plugin so it would have more demand and values.

The one thing Ark people need to know and should know is to have Ark token generating more demand and values in order for it to survive, or people would just fork and forget about it. They can do anything or not do anything but this one point is a do or die thing, incorporating Ark token into plugin.
I'm being reasonable with this post.