I've built a collection of Android musical instruments [0] and Lua was big win for the project. I was previously familiar with Lua and Love2D framework and I wanted to see how far I can push it. The language is expressive and lightning fast. Very few building blocks that fit together nicely. I dig tables as first class objects, and meta-tables to turn them into complex objects or call delegation mechanism.

My favorite feature is that it's interpreted. The Android app is just a runtime. I can edit source files right on the phone and re-execute. It's awesome prototyping platform.

[0] https://github.com/jmiskovic/hexpress