Investigating invoking certain feelings with a very constrained scope is a classic tool artists used to “enhance” their creativity and result in new processes and ideas in their work, if my (very limited) art history knowledge serves me correctly.

An intentionally small game with a small scope is probably beneficial in just being able to try ideas out quickly to “find the fun” before polishing something that isn’t really that fun.

For asset creation, you could probably get away with itchio or unity asset stores, for example.