The link compares it to Lua. Further reading reveals several improvements over Lua (IMO):

- "var", "let", and "extern" means no more accidental globals

- Arrays are separate things than Hash-maps

- Simple C API [1] that's not stack-based

- More built-in operators (even the conditional operator ?!)

- More "traditional" object/class concepts

- Strict typing!

- Fuller standard library

Neat!

My next project may very well be a Sparkling-scripted window manager for OS X.

[1]: https://github.com/H2CO3/Sparkling/blob/master/doc/capi.md