For each of the challenges below, see if you can come up with two EXAMPLEs of how it should work!
1) Warping - program one key to "warp" the player to a set location, such as the center of the screen
(EXAMPLE (update-player
)
)
(EXAMPLE (update-player
)
)
2) Boundaries - change update-player such that PLAYER cannot move off the top or bottom of the screen
(EXAMPLE (update-player
)
)
(EXAMPLE (update-player
)
)
3) Wrapping - add code to update-player such that when PLAYER moves to the top of the screen, it reappears at the bottom, and vice versa
(EXAMPLE (update-player
)
)
(EXAMPLE (update-player
)
)
4) Hiding - add a key that will make PLAYER seem to disappear, and reappear when the same key is pressed again
(EXAMPLE (update-player
)
)
(EXAMPLE (update-player
)
)
These materials were developed partly through support of the National Science Foundation,
(awards 1042210, 1535276, 1648684, and 1738598). 
BS:Games by Jen Poole, Emmanuel Schanzer, Ed Campos Jr, and Dorai Sitaram
is licensed under a
Creative Commons 4.0 Unported License.
Based on a work at www.BootstrapWorld.org.
Permissions beyond the scope of this license may be available by contacting
schanzer@BootstrapWorld.org.