Really nice job - I like the vibrating items to give you feedback on what your attempt selected. I'm not sure if a beginner will retain much by going through e

Really nice job - I like the vibrating items to give you feedback on what your attempt selected. I'm not sure if a beginner will retain much by going through each selector for each level - would be nice to throw in some levels that require you to think back to previous selectors. However, it's a good review for someone who's been exposed to them before.