Now let me see. Red Goggle Aliens are called Footas. Green Dragons are called Pubars. Pumping is only done horizontally and each pump is neutralised by each 'pip'. Just as well I suppose. Right.
This game has got nothing to do with corks on your hat. You are an allotment-owner plagued by the aforementioned Footas and Pubars. They lurk underground but can't pass through the earth unless they turn into ghosts. You, on the other hand, are a bit of a whizz at tunnelling, and your pumping is of Olympic standard. Pubars can breathe fire and gamma rays which do you a power of no good.
To destroy these bounders you can either pump them up and cause them to explode, or you can get more points by digging earth from under rocks and hoping that they fail and squash your foes. Success, as ever, only leads to greater torment. More and faster thingies harass you until it all becomes too much. This happened fairly early on.
I and my team of expert testers found the game rather uninspiring and initially difficult to fathom. I didn't know what was going on. Finding out didn't help much. It's OK, but not outstanding. I might even recommend it if, like the others, it wasn't so expensive.