Great game! I really like how if you flubbed something there was always a way to make an alternate route if you had the right blocks. Not too hard, not too easy, and the Undo button was way too helpful.
Three complaints, the first one is forcing weapons on the player when it comes to weapon drops. The Acid Gun is completely useless compared to the Gatling Gun and yet it keeps forcing the weapons on me every time I'm trying to get through a level, so I'm forced to downgrade for eight seconds just so it won't bug me to grab the gun for a while. The second is having the game spawn you pretty much an inch from smacking into a wall, so the second you start running it hits you even if you're holding down. There should at least be a second of invincibility or something to prevent this from happening. Third, the absolute amount of stuff on the screen in Survival. You cannot see anything in the slightest, particularly when the giant walker and UFO boss come on the screen. Coupled with the money dropping everywhere, not only do you have a laggy mess, but you also can't see your character at all, so you're left to making guesses on when to jump.
Otherwise, enjoyable game.
:D Thanks soliunasm!!!