Just gave your new update a spin, see a bit of the inventory expansion bit. Drill feels... a little strong. Also encountered a bug with it, when clearing a board and there's only one rock left, if you drill click on it, you won't have any other rocks to drill through, and thus get permanently stuck. If you decide to keep it, maybe make it so you can double tap the same rock to drill through it,
Also, to expand on the CR-8 reference with its various battery/splitter/amplifier components. For example, you have two weapons currently,one needs 1 power, the other two. But lets say your battery can output only 1 power at a time, then you'd need two batteries connected to your bigger gun to get it to work, or an amplifier which can double the power output of a battery. But what if you supply too much power to a 1 power weapon or system? Then it could damage your ship with an overload when used, heh.