I love the weakpoint mechanic, it's something obvious but the fact you made it work with monochrome deserves a shout out.
I'm not going to bother with the gravity puzzle though.
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It's because it's a bit janky for me unless I'm doing something wrong. The line between player and cursor being intersected changes the target, and it's easy to fall down, especially since I'm not good at using WSAD controls for precise platforming. It would be a good puzzle for a bonus item, but for progression I would prefer a less steep ramp up in difficulty for learning.