The problem anglez.xyz - abstract, on-chain, user-directed art solves

The future of art is user-directed, with consumers, buyers and patrons of art playing a part in the creation of artwork and customising art to their own tastes. Smart contracts enable the user to play a part in the creation of the art without direct involvement of the artist, while preserving the provennace of the art.

Challenges I ran into

The most challenging aspect of anglez.xyz was refining the Solidity art generation algorithm to create artworks consistently pleasing to the eye, which required a huge amount of tinkering and adjustment. The art generation algo was written in both Solidity and TypeScript, the latter for high performance generation before minting. Keeping these in sync is a challenge.
Integration with OnchainKit was always smooth, given the nascent nature of the the SDK, but it was ultimately a huge productivity boost, especially when building the Farcaster Frame.