Here comes the title screen and we're ready to play!

Ahhh, level 1. I remember oh so fondly my first time playing through this stage. If you want to land on the bridge before it collapses then jump from a little bit back from the edge of it. Try to get the scatter gun just after the second bridge, or if you can't get in there then there's one in the pill sensor box later in the level.

Here comes the first boss. Destroy that turret before the screen scrolls all the way over, then take out that guy on top, then destroy the guns while keeping your distance. Finally, take out the main target and it's on to level 2.