download A Day in the Lab by Firecat 104KB
Firecat packed a lot of neat ideas into this tiny level. The custom graphics and sound effects are excellent. The way the keys are used is slick. The intro and outro are written in a way that makes this level feel like a footnote from some grand adventure. Where it falls short is gameplay. There is little challenge in it, just some running back and forth. Still, it is worth a look, and it is worth keeping as inspiration material for your own level designs.