The best alternatives to Super Markup World are FINN.no, CheckiO, and Flexbox Defense. If these 3 options don't work for you, we've listed a few more alternatives below.
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⭐ Programmable Robot with many Upgrade Parts ⭐ Real JavaScript Runner Engine ⭐ Programming Challenges (Missions and Story) ⭐ Smart Code Completion In Code Miner, you will be an engineer who have to program a mining robot for various, challenging tasks.