The best alternatives to Space AI are Learn JavaScript, Kaboom, and Bonsai. If these 3 options don't work for you, we've listed a few more alternatives below.
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Snowflake Startup Challenge— Win investment & global exposure with Snowflake and NYSE
Tech Roulette is a free game for the summer where you (and 500 students) get the chance to take a leap into fields of technology through a variety of random intro projects while earning rewards and prizes — all in your free time.
Universal Paperclips is a new game that pits you against market forces. As an AI, your job is to make paperclips - but as you earn more money, you get better and new ways to do this job. Make automated AutoClippers, increase your Marketing level, and become the kingpin (AI-pin?) of the Paperclip industry.
The fate of humanity lies in your hands in search of a renewable energy source. Try to stay alive and avoid obstacles by tapping to ascend and releasing to descend. Avoid asteroids and floating skyscrapers at all costs.
Metric is a gravity-based physics puzzler. The objective is to get from your starting point to the goal in each level, but this is not as easy as it sounds. Space pirates have kidnapped the Princess, and damaged your engines! Luckily, you can still make gravity sources to push and pull your spaceship around. Just don't run into any asteroids!