The following page contains massive spoilers for those who want to know more about the game. Not just approximately where things are, I give specific coordinate rundowns. I hope this helps during gameplay.
Combos can be done while using yourself and pressing the number keys in quick succession.
A list of them is below.
Towers are scattered over the southwest quadrant of the game map and I will list them below. Please note that I will number them starting from the top left to the bottom right as numbers 1 (one) through 9 (nine) as there are nine total towers in Redspot at the time of this writing.
All towers are 50 tiles high and measure 25 by 25 tiles at the top.
Please note: there are no border fences at the tops of the towers so use your camera to avoid falling off and splattering on the ground below.
The mountain runs from the very west edge to the very east edge of the game map and the top runs on the x axis from coordinates 520 to 752.
The top of the mountain is 50 tiles high.
There are two breeches at the base of the mountain that I know of.
The first breech is located between 45, 501 and 55, 501.
The second is located between 645, 501 and 655, 501.
Battle City is located on the northern half of the map beyond the mountain.
There is a wall preventing easy access but there are a few fence breeches you can go through.
Breech 1 is at 301, 800.
Breech two is at 501, 800.
Breech three is at 701, 800.
Breech four is at 901, 800.
Breech five is at 1101, 800.
Breech six is at 1301, 800.
The sky tunnel leads both to the sky beam and to Battle City. The staircase you must climb to enter the tunnel is at 750, 750, 50 and is extremely close to the north edge of the mountain.
This is a zig-zagging metal beam that starts at coordinates 750, 1250, 69 and will allow you to climb and walk along it to Skyhub island.
To actually climb the beam you must jump within the sky tunnel at coordinates 750, 1250, 65.
To get to Skyhub island, follow these instructions:
Please note: The beam is very narrow and there are no safeguards preventing you from falling to your death so use your camera.
After you have successfully climbed the zig-zagging sky beam, you should find yourself at coordinates 750, 750, 750. Be very very careful as neither the land masses nor bridges have anything preventing you from falling to your death.
The island itself occupies the following coordinates:
starts at 600, 901, 750 and ends at 600, 1199, 750.
Starts at 900, 901, 750 and ends at 900, 1199, 750.
Starts at 901, 900, 750 and ends at 1199, 900, 750.
Starts at 901, 600, 750 and ends at 1199, 600, 750.
Starts at 600, 599, 750 and ends at 600, 301, 750.
Starts at 900, 599, 750 and ends at 900, 301, 750.
starts at 599, 900, 750 and ends at 301, 900, 750.
Starts at 599, 600, 750 and ends at 301, 600, 750.
Wood and match packs spawn here and can be picked up.
Cannon balls spawn here and can be picked up.
Sky lasers spawn here.
Bitcoin packs spawn here.
Antibiotic and poison drink packs can be picked up at this location.
There is a glass barriar around this location so don't worry about having to use your camera too much.
Fireball packs and fire bombs can be picked up here.