Level 1-IV is a bonus level in Ground Hog Day. It is unlocked by collecting a combined total of 10 stars in the levels 1-13, 1-14, 1-15, and 1-16.
The player is given a 4x4 grid, along with the following parts:
- 1x Ross
- 6x Wooden Frame
- 2x Wooden Wheel
- 1x Metal Wheel
- 2x Black Soda Bottle
- 2x Green Soda Bottle
- 1x Spring
- 1x TNT
The player is awarded stars for the following conditions:
- Ross reaches the goal.
- The level's Star Box is collected.
- The level is completed within 18 seconds.
The vehicle you'll be using for this level is a simple cart with another frame containing Ross on top of the middle frame, a box of TNT below Ross, and the four Soda Bottles attached to the remaining spots on the main part of the cart, pointing left. The cart should be towards the right side of the grid, or it won't start rolling on its own.
To collect the Star Box, bring the cart to the right side of the level before detonating the TNT. There are some hills throughout the level that are too steep for the cart to get over on its own; you'll need to use the Soda Bottles to push the cart up and over these, activating them right before the cart reaches the bottom of the slopes directly before these hills. Once the cart reaches (or stops just before) the Star Box, detonate the TNT and Ross should be thrown into the goal. Even if the cart didn't quite reach the Star Box, the shrapnel from the cart will be able to collect it for a moment after being torn apart, and there's a good chance it might do so; the problem is getting Ross to fly into the goal instead of out the other side, a problem you can only solve by doing it again until it works.
For the time condition, bring the cart past the first big hill. Then, once the cart is directly above a patch of thin grass, detonate the TNT and Ross should fly into the goal. If not, try again until it works, adjusting your timing if necessary. If the cart doesn't reach the patch of thin grass in time, use the other Soda Bottles for a speed boost at the beginning of the level.
The platform above the starting area has a Skull on it. To reach it, rotate two of the Soda Bottles to face right, activate the left-facing Soda Bottles at the start of the level, activate the right-facing bottles once the cart is halfway between the start of the level and the first patch of thin grass, and detonate the TNT once the cart stops moving forward. Ross will be thrown onto the platform, collecting the Skull.