I haven't used VXA before, but I hated VX's mapping tools and I imagine the map creation is somewhat similar. Mapping in VX sucked really bad compared to XP imho, so I chose XP.
If that wasn't the case, I'd consider it.
I can add temporary saves (aren't stored via server though) and I can put the menu back in if you'd like. I removed it because it would be messy depending on what people decided to do with it. You can also use as many maps as you want, and I may add instancing in the future. Instancing is a little more difficult and would increase server load by a bit more, but it would definitely be possible. I'll add all three of these to my //TODO list.
Also, came across a Pokémon game I made when I was 10, and it got me thinking - I might make a little Pokémon game for my room. Your little game also made me realise that there is a lot you can actually do with the framework I've made that I haven't really seen myself.
I'll make my room a tech demo.