Walrii dts Nspire:

Contents:
  1. Gameplay
    1.1 Game modes
    1.2 Different sprites and power ups
    1.3 Status Bars
  2. Controls
  3. Credits
  
1. Gameplay
  The goal of the game is to survive as long as possible without hitting the spikes. Thus you die if you hit a spike or hit the top or bottom of the screen.
  The game is similar to flappy bird in that you either jump or let yourself fall.
  You move back and forth between the sides, with new spikes being generated each time you switch sides.
  Your score is the number of times you've switched sides, and as your score increases the speed and number of spikes being generated also increases.
  Finally, you earn coins based on the number of points you get when you die. You can use coins to buy new sprites(see 1.2).
  
  1.1 Game modes:
    There are two game modes: classic and timer.
    In classic you play as normal, and die if you hit a spike.
    In timer mode, the game lasts two minutes, and if you hit a spike your score decreases by three points. However, if you hit the ceiling you die, no matter how much time is left.
    When your two minutes are up or you hit the ceiling, you die, and your score is taken as normal.
   
  1.2 Different sprites and power ups:
    Using your coins, you can buy new sprites. These sprites have abilities, which allow you to boost gameplay. Sprites vary from 50-2000 coins, and there are 12 of them in total(including the starting sprite).
    You buy new sprites in the store.
    There are three different types of abilities or power ups the sprites offer:
      1. A few sprites have the ability to destroy one random spike. They take a small amount of type to regenerate, but are(in my opinion) not that useful.
      2. A good amount of the sprites have the ability to destroy all the spikes in the round. This takes longer to regenerate, and is pretty useful.
      3. Lastly, another good portion of the sprites have invincibility. When activated, the sprite cannot die for a certain amount of time. These take the longest to regenerate.
      
  1.3 Status Bars:
    There are up to three status bars in the game at one time.
    The thin one highest up is only available in timer mode, and it shows how much time you have left. It grows smaller and gets gradually redder as less time is left.
    The thick one near the top shows the status of the ability. If it is fully charged up, green, and with a dark green border, the ability is ready. Otherwise it grows and gets gradually greener as reaching completeness.
    The blue thick one near the bottom only appears when you activate the invincibility ability. It shows how much time is left until the invincibility wears off.

2. Controls
  You flap your wings/jump by pressing Enter or clicking.
  You activate the ability by pressing tab or any key under on.charIn(c), which includes, but is not limited to, pressing an alphanumerical key.
  
  Use the up and down arrow keys to navigate the menu, and press backspace/escape to exit out of a process, going back to the main menu(usually).
  Use the four arrow keys to navigate the store, and click/press enter to buy or select a sprite. Just having your cursor over the sprite will not select it.
  
3. Credits
  The game was developed by Andrew Krapivin, otherwise known as semiprocoder or awesommee333. You can contact me by emailing andyhsstudent@gmail.com.
  Thanks goes to adriweb and ldstudios for their Better than Lua api.