Really enjoyable at first, then gets boring and repetitive. All weapons are the same, the levels and enemies are the same, the same slutty princess every time.
On some of the downhill slopes there are small depressions that make you "jump". You have not jumped on the top of the hill, and are going down the hill with a moderate speed, then you go over the depression and it registers as a "jump". Edit you tracks pls.
Great level pack for this game. I beat the 12 levels in one seating, I didn't find any of them to be hard. The SAM idea is very nice. If anyone is having problems - just rush in survivors/nearby upgrades, then build a blaster or a mortar to defend your base while you pile up reactors. You can win every level with 3-4 mortars and a blaster for every creep spot to seal it, but it's easier if you go berserk with 10 of each :)