pros: i really love the concept and execution of this game! the art style is really cute, and i like how the warm palette used for the past differs from the cool palette used for the present. i could definitely see this being expanded into a full game with lots of levels, but as it is it's a fun, albeit short, little game. super cool!
cons: the controls feel a little awkward, at least for me. i'm right-handed, so it feels... off? to shift my position to use my left hand to press the arrow keys and my right hand to use the mouse. the instruction text is also a little hard to read, but that's easily fixed by putting the text in a box.
bugs: when switching between time periods, the player can get stuck in objects. this is easily fixed my switching back, but it's still a noticeable bug.