This idea is freakin' epic! The pixel hex style works perfectly for what you're going for and good for scope as well. I recognized a lot of your style references right away which is great because it means your style is clear and cohesive. I love the mechanic of the player being able to combine actions to create new combinations, definitely lean into that more! The gameplay loop is good and can keep the player guessing. Make sure that the environmental challenges you bring forth force the player to think and adapt using and learning about their different actions and combinations of said actions to overcome each escalating challenge. I absolutely can't wait to see how this turns out!