The best alternatives to Metric are Scratch, Space Shake!, and Element. If these 3 options don't work for you, we've listed a few more alternatives below.
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AssemblyAI— Speech-to-Text API with superhuman accuracy
Scratch is a high-level, block-based visual programming language and website designed mainly as an educational tool for children, especially those aged 8 to 16. It allows users to create projects using a block-style interface, available to use for free.
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.