Overall, a fairly well-made game, but it has a few glaring flaws. Taking damage from spikes from the side makes no sense. Invisible walls with no indication they're passages are not an improvement to any game they're in. The platforming is a bit too slippery. It's like you're gliding on ice when moving through the air. Setting the camera too high and allowing the player to look below you is more annoying than it is an interesting mechanic.
Not being able to see the entire map at all times turns certain levels into a game of memorization rather than a puzzle or skill. Spikes killing you from the side is a video game trope that should have ended a long time ago.
It takes way too to accrue enough coins to use them on anything worthwhile. Even then, it's a shot in the dark since you have no idea how good or bad the puzzle you are paying for actually is. A free puzzle of the day would help to alleviate this by giving players a reason to stick around.
We made a few changes since your comment. You now get enough coins daily to play up to 4 small puzzles (or one of the really big ones). We also doubled the rewards for creating puzzles and added Subscriptions which allow you to play any number of puzzles!
This is a great game save for the ridiculous energy restrictions. You need to either increase the maximum energy with each level, or reduce the amount of energy required to attempt a mission. At the current rates, I can only play four missions every two hours. That's about three minutes of gameplay, tops. It's sad that you're too greedy to allow people to enjoy your game.
We made a few changes since your comment. You now get enough coins daily to play up to 4 small puzzles (or one of the really big ones). We also doubled the rewards for creating puzzles and added Subscriptions which allow you to play any number of puzzles!