HARD TROPHY TIPS: Always be digging deeper every round to collect a better depth $ bonus. Don't worry about pickups for the first 5 days. The first day upgrade choice is ALWAYS Drill Strength. Always find out WHY your round stopped and buy the appropriate upgrade (Fuel or Depth) depending on which one popped. You HAVE to get all trophies if you want a chance at the Big Boat. Never buy the mole unless you can upgrade it to level 2. ALWAYS leave cash for the next round, never "spend it all".
It's good, but the sound is really lacking in this one in that it doesn't seem to match the speed of the vehicle and takes away from the graphical intensity. It looks like I'm going fast, but it sounds like I'm in a tiny cartoon flying saucer.
I think where the game gets really smart and interesting is when the teleportation gets introduced. For novice gamers, I don't think that the teleportation mechanic would be so self explanatory as things in this game that are in a shade of gray are to be ignored, the teleport "stamp" is set to that grayish vocabulary. Great game, good work. No autosave, so it has to be played all the way through in one sitting.