I can understand where you’re coming from. Why waste effort on something that may not impress adcoms? Of the two choices, I think Chemistry is a better choice. Reasons why:
- Easier to find nationally recognized awards
- Links to a clearly defined potential major in college
- Adcoms would have an easier time sending your work to a prof in the Chem department to review. Not all students' work is sent to professors for review. But if your work is good enough, they may ask for faculty input. Much easier to do with chemistry related work. Video game design -- who would they send to? Engineering faculty? Comp Sci? Design?