CODE SLIME: Program the Slime with Blocks

GAME INFO

What is the objective of the game?

The objective of Code Slime is to introduce core coding concepts by arranging symbolic visual command blocks. Players must drag direction, loop, and jump blocks into the command zone to navigate a Slime across a 4x4 grid, collecting gems and bypassing obstacles. Introductory stages require basic directional arrows, while higher levels introduce loop functions and jump mechanics to streamline code sequences. The main challenge is to complete each grid within the maximum resource limit to earn 3 stars, managing block efficiency carefully. Unlocked levels can be replayed from the main menu to achieve higher scores.

Recommended age and educational level

This game is recommended for ages 6 or 7 and up (Elementary School, Middle School through Adults). It is tailored for elementary school students as an entry point to computer science without syntax writing, as well as STEM teachers, parents, or tutors seeking to foster structured computational thinking. The game requires no prior coding knowledge, relying solely on basic directional literacy and spatial awareness.

How to play: single-player or multiplayer

This is a single-player game designed for independent logic practice. However, it functions effectively as a collaborative pair activity in classrooms, where students pair up to discuss, write down, and evaluate the algorithm before executing the blocks on screen.

What do you learn with this game? Learning and skills

Code Slime integrates Computer Science, STEM, and Mathematics curriculum goals while targeting the four core pillars of computational thinking:

Decomposition: Breaking down a complex navigation path into small, manageable action steps.
Pattern recognition: Spotting repeated movements to implement loop functions and conserve resources.
Abstraction: Analyzing efficiency by weighing resource costs (e.g., opting for a 2-unit jump over standard moves).
Algorithm design and debugging: Assembling a logical sequence of instructions and troubleshooting code when the Slime misses the target.

Tips to get the most out of this game

Pedagogical challenge: Encourage students to write down their algorithm on paper before dragging the blocks on the digital canvas, calculating total resource costs in advance to aim for a perfect 3-star score on their first try. Unplugged activity: Tape a 4x4 grid onto the floor and place a prop to represent the gem. One student plays the role of the "Slime" while another hands them printed command cards ("Move Forward", "Jump", "Loop") to physically navigate the maze without using a computer screen.