Boulder Dash/Objects

Objects

Rockford	Empty Space	Dirt	Boulder
Diamond	Wall	Titanium Wall	Magic Wall
Firefly	Butterfly	Amoeba	Exit

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Name	Behavior
Rockford	Can be controlled by the player in 4 directions Can dig Dirt, collect Diamonds, and push Boulders Can do those actions above while staying in place Can go into an Exit when it opens to complete a cave Can be killed by falling objects, getting caught in explosions, or touching enemies on contact
Empty Space	Can be occupied by Rockford, an enemy, object, or obstacle
Dirt	Can be dug by Rockford by moving into it or staying in place Can be destroyed by explosions or taken over by Amoeba
Boulder	Can fall down, and roll off from Walls, Boulders, or Diamonds Can be pushed by Rockford by moving or staying in place; the moment it is pushed is randomly determined Can be turned into a Diamond upon dropping through an active Magic Wall Can be destroyed by explosions
Diamond	Can be collected by Rockford by moving into it or staying in place, as long as it doesn't move Can fall down, and roll off from Walls, Boulders, or Diamonds Can change into a Boulder upon dropping through an active Magic Wall Can be destroyed by explosions
Wall	Can be destroyed by explosions
Titanium Wall	Cannot be destroyed in any way
Magic Wall	Looks similar to a Wall Can be activated along with other Magic Walls by dropping a Boulder or a Diamond Can convert Boulders and Diamonds back and fourth Can make converted Boulders or Diamonds disappear if something occupies below Cannot convert Boulders or Diamonds if it remains above it instead of dropping through Can expire after a limited amount of time of being active Can be destroyed by explosions
Firefly	Can navigate by following the left side (clockwise) Can stop for a brief moment if there is no Empty Space to the left side before resuming navigation Can be killed by a falling Boulder or Diamond, or by touching an Amoeba on contact
Butterfly	Can navigate by following the right side (counterclockwise) Can stop for a brief moment if there is no Empty Space to the right side before resuming navigation Can be killed by a falling Boulder or Diamond, or by touching an Amoeba on contact Can contain 9 Diamonds upon being killed but not in explosions
Amoeba	Can grow by a specific amount of speed in a random routine; whether it is fast, slow, or never growing at all Can grow over Empty Space or Dirt Can kill Butterflies or Fireflies on contact Can be turned into Boulders upon growing up to 200 units Can be turned into Diamonds upon being unable to grow Can be destroyed by explosions
Exit	Looks and acts similar to a Titanium Wall Can be revealed and opened when Rockford collects enough Diamonds in a cave Can be entered by Rockford to complete a cave