This DLC is for Escape Expert-Supporter Edition.
With this DLC, your can get a very cute patato car for free as souvenir, which is the first car in our game's very beginning version.
Without this DLC, you still can earn money in this game and buy it, this DLC is not necessary and won't affect any gameplay.
If you want to support me to develop this game and pay more for donation, you can buy it, you will get this souvenir car. If you just a normal player want to try this game, you don't need to buy this DLC at all.