FOSS gamedev and creative worlds

I have made mods for minetest but don't have computer that run minetest. Can someone please test these mod? Feel free to post your untested mods and test any mod you like and post an debug.

I need my concrete 2.0 tested for super strong features. place concrete source next to steel block and wait at least 5 minuts (until it hardens and changes to lighter color) dig that block and test if it is very hard. link Concrete 2.0