The simple graphics with the retro sounds and music worked really well together. It really felt like you were taken into the past. As for the gameplay, you could've made the theme more prominent. Collecting the small magnets didn't change all that much and wasn't really required to complete the levels. Also, at first I was a little confused because the collectable magnets and the enemies look very similar. Maybe it would have been better for the enemies to be something other than magnets, just to differentiate them more visually. I did like the challenge of avoiding the walls. They just felt a little unfair at times, as even barely touching was enough to void out. Maybe tweak the hitboxes a little. But that's a minor nitpick. Overall, good job.