That looks awesome, very well done! I have used those same stick on tiles before from Bunnings but being even lazier I just stuck em on directly :lol: Looks amazing and a very affordable alternative!
I also use those tiles but just on the floor. This one in a snake enclosure ended up being covered in Kritter's Crumble but they're working well down the food & water end of my lizard tanks. I used to use astro turf but the tiles haven't budged in over a year. Much easier to clean as well!