You can get fun things to happen with few lines of code. The whole API fits into your head, and together with Lua's simplicity this is a powerful combo. Any complexity in code comes from your side. With live reloading, development happens in tight loop with running environment, and this easily drags you into the zone.

At the same time the framework is low level. The included functions cover only interfacing HW and rendering graphical primitives. It's just a thin abstraction layer that greatly simplifies accessing OS features. Everything else like scene management, AI navigation, live code reloading, skeletal animation, common graphics shaders, tile maps, sound management, UI, that's all left out of the framework. Numerous Lua libraries were made to fill in the missing stuff.

You get to pick from different solutions and glue them together with script code. This is very consistent with general Lua mindset. Neither functional constructs nor OOP are not included in Lua, but both can easily be brought in with any of dozen libraries. It creates fractured space and it's kind of bazaar of different tech stacks that are same but different.

Other frameworks and engines (Defold, Solar2D, Roblox) that use Lua all take integrated approach where more of functionality is crammed into engine itself. This is a more closed solution where you aren't supposed to extend the engine much, just script inside it.