It was a really good game but there were some prob
I just finished playing this game and i can tell you that it is worth playing through, it has nice level progression and an ok sound track. My only real problem is that it is real easy to get money and when you die you still get the money.
In other words getting the upgrades is a lotfaster and they make the game just Way too easy.
So my suggestion is either make the game harder, make upgrades more expensive, or when you die you get a cash penalty