Hey and thanks for some nice critique! And i know i need to make some things clearer and give feedback to the player as well as going over the naming of things! (my naming scheme has been quite chaotic, but its getting better).
The heal is intentionally more expensive since I was thinking of the gameplayloop as balancing between having autoclick on/saving up your energy by clicking manually in order to not loose any health!
greater luck gives you a better chance to spawn energy boosters, and when i figure out tooltips ppl will know this! :D