Lenny Loosejocks in Space/Neptune

In the future, Neptune is the planet of cow farts, using their emissions as a power source. The bomb is located in a building up high, but in order to access it, the machine lifting it up needs to be powered.

Since Neptune uses cow farts, you will need to collect some. There's a big pen holding hundreds of cows under ground, but getting into it is a bit tricky. Flip the lever behind the shed to remove the latch on the floor inside of the shed. Then walk into the back part of the shed, the floor will give and Lenny will end up in the pen. From there just flip the lever to start the suction machine

Before you climb up to the bomb room, make sure to flip the lever next to the cliff face to turn on the bomb lifting machine.

Disarming the bomb
The bomb is a memory matching game. It starts by finding pairs, with each round increasing the group size by one until you are matching up six identical symbols.

Once the bomb is disarmed, note the digit that appears and walk back to the space ship to complete this planet.