OP here, I just went with indentation-based syntax because I prefer indentation over curly braces aesthetically. I've got no problem with people who prefer curly braces and I find C very enjoyable to work with. However, when I started the language, I wasn't starting with a C parser and modifying from there, I was writing the parser from scratch, so I opted to go with the syntax I enjoy most. I'd like to think that Tomo's syntax is easy enough to pick up, especially for anyone who has used Python before.

I actually agree with you that syntax is not one of the things that makes C hard. C's syntax is mostly very easy to work with (apart from a small number of edge cases). The actually challenging parts of working in C are things like manual memory management, doing good error handling, the lack of proper namespaces or modules, a sometimes-footgunny standard library, and so on. I wanted Tomo to improve on the usability and safety of those areas, while keeping the parts of C that I really love: a simple type system, pointers as a language concept, fast parallel compilation (one source file -> one object file), and a programming model that feels closer to what the silicon is doing than most languages.