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Can you write a simple single-screen platform game example in JSE?

Thought for 10 seconds

Okay, the user wants a simple single-screen platform game in GotoJSE. Let me start by recalling the language's features from the provided command list.

First, I need to set up the screen with Graphics. Then, handle the game loop using Repeat...Forever. The player should move with the gamepad or keyboard, so I'll use GamePad(Button) functions. Jumping requires some physics, maybe a variable for vertical speed and gravity.

Collisions are a bit tricky. The example uses Collide, but I need to create collision handles for the player and platforms. Let me use Rect commands for platforms and the player, which return collision handles. Check if the player is on the ground using Collide.

Scoring and lives can be tracked with variables. When the player collects a pickup, increment the score. If they fall off the screen, decrease lives.

For platforms, I can use an array to store their positions. Maybe generate a few platforms initially. Pickups can be another set of positions, and when the player collides with them, they disappear and add to the score.

Audio feedback using PlaySfx for jumps and pickups. The available sounds like beeper_jump or pickup_1 should work.

Testing for falling off the screen: check if the player's Y position exceeds the screen height. Respawn them if necessary.

Putting it all together: in the main loop, handle input, apply gravity and movement, check collisions, update positions, draw everything, and manage game state.

Need to make sure all variables are declared properly, use Dim for arrays. Also, remember that GotoJSE uses Gosub for subroutines. Maybe use subroutines for drawing HUD and handling collisions.

Wait, the example code uses Gosub AddMessage. I can follow that structure. Also, remember to use Flip after drawing to update the screen.

Let me outline the steps:

1. Initialize screen and variables (player position, speed, gravity, platforms, pickups, score, lives).

2. Main loop: handle input (left/right, jump), apply physics (gravity, jump velocity).

3. Check collisions with platforms to allow jumping when on the ground.

4. Check collisions with pickups to collect them.

5. Draw player, platforms, pickups, and HUD (score, lives).

6. Handle respawn if player falls, update game state.

7. Play sounds for actions.

8. Use Flip to update the display.

I need to make sure the player can't jump mid-air unless on a platform. Using a grounded flag that's set when colliding with a platform.

Potential issues: handling multiple platforms, ensuring collision detection works correctly. Also, array management for platforms and pickups.

Testing code structure step by step. Let me start coding.

  --v