trace game: but off the screen. the trace game is fun, but if the object is not fully seen, if you have to trace and that moves you off the screen, so that the final image is larger than the screen, this would produce a great challenge
might turn it into the connect the dots/numbers game because then you really don’t know what you’re creating until after completion

potion shake game: how could you make it more exciting, well the theme is only so, so, but what if you made it even more scientifically accurate and you had to find recipes to make items, then make the items to order. So it could teach chemical formulas and allow you to stockup your laboratory and also find out where the base chemical elements come from [as you go to collect them, you learn what the sources are]

tilt game: this game is fun all on its own, but with the right characters and visuals it could be really addicting. the look/theme made sense before, but for rebranding individually, it would be great to have something adorable

music memory: It’s basically musical simon says, but I’m not sure this has standalone potential other than simon says

rebus: this is great but there are only so many rebuses. a clean neon-sign from the 80s look could give them new life. Or the old steampunk printed press look.