We can see how the game's art has improved quite a lot.
Besides the game's playability has improved because there are more enemies at a time and there AI has got better being able to go upstairs and downstairs.
Use the arrow keys to aim to different buildings and floors.
Press space to shoot them.
Press c-v-b-n-m to start running when you spot a dynamite cartridge about to explode.
When you shoot at one guard is NOT only enough to kill them and then you stop shooting. The more you shoot the more money you will get and only when you get certain amount of money will you be able to enter the bank and see the building from inside.