In The Jelly Monster Lab you are a scientist trying to make the best jelly monsters. In order to do so, you need to move through the labs, trying to find the parts you need to make your monsters.
At the beginning, every player starts with two experiments. Every experiment shows a monster made with a colored body (blue, red, pink or green), eyes (1, 2 or 3) and a mouth (happy or sad) and a lab where you must make it (A,B,C,D,E, or F). The parts are spread out over the six labs, so you move to them and grab the parts you need to make your monsters, but you cannot have more than 5 cards in your hand. To move cards to and from your hand, click on the card then click the arrows to the right of the "Your hand" section.
Once you have your experiment card and the parts, move to the lab indicated by the experiment card and leave all there (the experiment card and the parts). When other player come to visit that lab, it'll find your monster and then, it will be yours.
While you're moving through the labs, you're leaving trails in order to know which player was the last to visit it. If you move to a lab with a trail, there may be a completed monster left by the owner of the trail. In addition, you can't move to a lab you were the last to visit, so you need to plan your moves to have all the parts of the experiment before you arrive at the required lab where you must leave the experiment card and all of the required parts. You do not score your completed monster until another player visits that lab.
At any time, you may go to the center to pick up a new experiment and make a new monster. You will not be able to go to the center if you just came from there (your meeple shows laid down), or if you have the maximum number of cards in hand (five).
When a player has 4 monsters completed, the center is open to end the game. Any player who goes there, finishes the game.
Every monster has an score on it, depending on how difficult is to find their parts. You can see how many parts of each type are in the game and all of the experiments on the guide card placed on the bottom left corner of the playboard.
The player with the most points win the game.
Advice: If you have experiments, one side too low scored, or on the other side too difficult to find the parts, you can leave the experiment card in any lab, so other players can play with it, or maybe you can play with it in a later visit.