Thanks for playing!!!
The main issue I think is that the demo doesn't allow learning at all, You get all the mechanics frontloaded and then you get punished for trying to figure them out. The only way to really facilitate non-masochistic newcomers is to have multiple difficulty modes and there will still be friction just from the core design being so unorthodox.
For a quick band aid, I uploaded an easier version that is lot less punishing in terms of energy usage and has soft checkpoints on every level in the form of dummies that drop free energy when hit.