You might be interested in checking out the playdate[0]. It's a handheld game console that's absolutely chock full of these sorts of things and it's absolutely

You might be interested in checking out the playdate[0]. It's a handheld game console that's absolutely chock full of these sorts of things and it's absolutely delightful. For example to unlock it you need to press the unlock button twice. If you press it once one eye opens, if you press it twice both eyes open and the thing unlocks. If you press once and wait a bit a thought bubble pops up telling you you need to press it twice.