Troubled River by juanmoralesgui1

Title: TROUBLED RIVER

Platform-MSX2

Author-Juan Morales (@ juanmmoralesgui1)

Language-Msx2basic

Category-EXTREM-256

INSTRUCTIONS: We are in control of a boat descending an increasingly vertiginous river with numerous obstacles that we must overcome. CONTROL, are the up and down cursors.

LISTING COMMENT

line 10- Establish screen mode, draw on page1 the graphics to be copied for the scroll, load sprites and their colors.

line 12- Draw marker, start variables and activate sprite collision.

lines 20- Update the position of the boat and scroll movement.

line 30- Reads the keyboard for boat movement and establishes the upper and lower limits for its movement. Congratulations message for finishing the game and you can start again.

line 40- Movement of the sprites obstacles. (3 rocks)

line 50- Movement of sprites obstacles (waves and logs), with the variable f lines 30 and 40 are interchanged.

line 90- Collision with an obstacle. Game over and start over.

line 100- reading sprite data.

line 110-reading color sprites.