Hello,

Since 2009 I develop 2 released server projects:

1. "rupy" - HTTP App. Server & JSON DB - http://host.rupy.se
2. "fuse" - Multiplayer Online Standard - http://fuse.rupy.se

I'm also working on 2 unreleased client projects:

1. "mesh" - P2P radio internet protocol and device - http://radiomesh.org
2. "park" - C+ Khronos (OpenGL/AL and Collada) 3D MMO client - http://ahoy.rupy.se

The dependencies of the projects are:

1. Server: JavaSE <- rupy (HTTP/JSON) <- fuse <- mesh/park
2. Client: C+* <- GL/AL <- EW/ES <- park

"park" runs on the Raspberry 4, Jetson Nano and x86/Windows.
"mesh" runs on all Raspberry Pi models and Raspberry Pico.

Sponsorships are without guarantees** for what is already done. The future projects have a literal dead line. If you have doubts that I'll be able to pull it off, here's my proof of concept game for the multiplayer technology which was made between 2012 and 2014 in my spare time: http://aeonalpha.com.

The radio mesh is higher risk and potential reward, but a simple "Host your own base station and receive mails on a pager like device within 1 hop range" is definitely doable and maybe useful depending on LoRa and eventually better radio technologies that hopefully come later. Edit 2022: I have switched to Pico on 169MHz!

The different sponsor tiers are just which project you wish to sponsor, it would probably make sense to detach the value from the goal but that is up to github. The commercial tiers allows you to mod, host and sell the game*** they can be found on gumroad because they have VAT on recurring payments: https://tinspin.gumroad.com/l/xwluh.

* I use string/stream and objects/namespaces for project structure only from C++.
** The sponsorship is a gift: not outright, not onerous, not remunerative.
*** You need to purchase the royalty free asset bundles separately.