I found the solutions... hold on... let me think on what to do..
Spoilers:
open the windows
turn the arrow around
click on that lightbulb until it breaks
Open the hatch above the yellow arrow
Click on the yellow arrow
Click on the new guy
Okay timing is needed for this part: First move the cannon to the high position, click on the guy again, flip that spike sea-saw type thing near the bell when the bell rings
Okay now you need to set the cannon on low...
Timing again: Send the first bomb out and hit it with the downed 'bridge' to smack it up in the air and cause it to not cause harm, do it again with the next bomb...
Now send out the remaing ball in the low position (Do not hit it with the bridge... the guy in the locked room will now use it to break out
Okay send it back to the high position
Click on the guy again
Send another guy out
Shoot the guy in the cannon out at the bell tower
Click on him to get him to move the bell tower to move
switch the see-saw type thing
Click on the bell until it falls
Now I can't seem to get the final part again... but to move on... click the door under the red arrow
I believe you click on the guy on the lower level before the currently moving guy gets in the building
