Ahead is the title of my next Axe calculator game: a platformer where you cannot go back. That's right, you can't go back.

Here's an initial screenshot, with a very concerning bug:



No, I will not be using someone else's code as a base. It's all mine this time.

I actually started this program with the help of Ashbad but I deleted the whole code (on purpose) because it was very messy and started it all over again.

.PLATFORM
[3810385410282828->Pic0
[FFFFFFFFFFFFFFFF->Pic1

0->X
40->Y

While 1

ClrDraw



Pt-On(X,Y,Pic0

For(A,0,96
Pt-On(A,48,Pic1
A+7->A
End

DispGraph

.pxl-Test(X,Y)r  Returns 1 if pixel is black and 0 if pixel is white on the back buffer at (X,Y).

If pxl-Test(X,Y+8)r=0
Y+1->Y
Else
End

If getKey(3)
X+2->X
End

If getKey(4)
Y-2->Y
End

End
This is my code, I made a pxl-Test collision check to avoid the character to drop below the floor, but it doesn't seem to work very well.

That's the only help I need at the moment, thanks

First, I highly recommend that you add ending parenthesis.
Doing
For(A,0,100
  If A=(rand^100
    Pt-On(10,10,Pic1
  End
End
is no different (and is equally optimized) compared to
For(A,0,100)
  If A=(rand^100)
    Pt-On(10,10,Pic1)
  End
End
Also, not adding parenthesis can do very odd things to your code, and because they don't give you a speed increase like it does in Basic, you should probably just add them.

Also, because I needed a break from what I was doing, I simplified parts of your code:
.PLATFORM
Fix 5

[3810385410282828]->Pic0
[FFFFFFFFFFFFFFFF]->Pic1
0->X
40->Y

ClrDraw

.Main game loop
While 1

  .Moving right
  If getKey(3)
    X+2->X
  End

  .Jumping
  If Y>0 and getKey(4)
    Y-5->Y
  End

  .Create floor
  For(A,0,12)
    Pt-On(A*8,48,Pic1)
  End

  .Collision test (ground) and Gravity
  !If pxl-Test(X,Y+8)
    !If pxl-Test(X+7,Y+8)
      Y+1->Y
    End
  End

  .Display sprite
  Pt-On(X,Y,Pic0)

  .Display the screen
  DispGraph
  ClrDraw

  .Close Game
  If getKey(15)
    Fix 4
    Return
  End

End

Not sure why you were using StorePic and RecallPic, but I think those were the cause of your problems.

I can help with physics too, I'm pretty decent at it, though builderboy might be better

Yeah, collision detection can be a major PITA at times.

In the project I'm working on right now, I'm trying a method where each time I make an object move (they're sort of like bullets), I see if their x and y coordinates are within a certain range of my character.  I'm not too sure if that might work for tiles, though.

Yeah what Shmibs said. That's what JustCause did actually. I heard that if you do it wrong, it can run very slow, though.

I've made a similar platformer that only moves in one direction, but its not done because of collision detection with incoming obstacles.  What I did for jumping was have a variable called J for whether he's jumping or not, a var F for whether he's falling or not, and T as a timer, and V as the vertex, where he stays put in the air for 2-3 frames.  (bad physics.  )

for side scrolling you could just use "Horizontal -"