ok

pushbox.p8

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+pico-8 cartridge // http://www.pico-8.com
+version 42
+__lua__
+function _init()
+ initmap()
+
+end
+
+function _update()
+ updateplayer()
+ 
+ if btnp(❎) then
+  reload()
+  _init()
+ end
+end
+
+function _draw()
+ cls()
+ camera(-20,-20)
+ map()
+ drawboxes()
+ drawplayer()
+
+end
+-->8
+function initmap()
+	m={
+	 w=8,
+	 h=8,
+	 wallmap={},
+	 boxmap={}
+	}
+	
+ boxes={}
+ box_i=1
+ box_number={[5]=1,[21]=2} --number on box
+ 
+ player={
+	 x=0, --position
+	 y=0,
+	 dir=1,
+	 --1 right 2 left 3 down 4 up
+	 image={3,4,19,35}
+ }
+ 
+---map
+ for i=0,m.w-1 do
+  m.wallmap[i]={}
+  m.boxmap[i]={}
+  
+  for j=0,m.h-1 do
+  
+   m.boxmap[i][j]=0
+   local f=fget(mget(i,j))
+   if f==2 then
+    m.wallmap[i][j]=1 --wall
+   else
+    m.wallmap[i][j]=0 --void
+   
+---player
+    if f==4 then
+     player.x=i
+     player.y=j
+     mset(i,j,17)
+					
+---boxes
+    elseif f==8 then
+					local box={
+					 x0=i,
+					 y0=j,
+					 x=i, --position
+					 y=j,
+					 image=mget(i,j),
+					 number=0
+					}
+					box.number=box_number[box.image]
+					
+					boxes[box_i]=box
+					m.boxmap[i][j]=box_i
+					
+					box_i+=1
+					mset(i,j,17)
+				end
+   
+   end
+  end
+ end
+end
+
+
+function drawboxes()
+ for b in all(boxes) do
+  spr(b.image,b.x*8,b.y*8)
+ end
+end
+-->8
+function updateplayer()
+ if btnp(➡️) then
+  player.dir=1
+  try_move(1,0)
+ elseif btnp(⬅️) then
+  player.dir=2
+  try_move(-1,0)
+ elseif btnp(⬇️) then
+  player.dir=3
+  try_move(0,1)
+ elseif btnp(⬆️) then
+  player.dir=4
+  try_move(0,-1)
+ end
+end
+
+
+function try_move(dx,dy)
+ --void + move
+ if m.boxmap[player.x+dx][player.y+dy]==0 and
+    m.wallmap[player.x+dx][player.y+dy]==0 then
+  player.x+=dx
+  player.y+=dy
+ 
+ --box + push
+ elseif m.boxmap[player.x+dx][player.y+dy]!=0 and
+        m.wallmap[player.x+dx*2][player.y+dy*2]==0 then
+  --box update
+  local bi=m.boxmap[player.x+dx][player.y+dy]
+  m.boxmap[player.x+dx][player.y+dy]=0
+  m.boxmap[player.x+dx*2][player.y+dy*2]=bi
+  boxes[bi].x+=dx
+  boxes[bi].y+=dy
+  
+  player.x+=dx
+  player.y+=dy
+ end
+end
+
+
+function drawplayer()
+ spr(player.image[player.dir],player.x*8,player.y*8)
+end
+__gfx__
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+__gff__
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+__map__
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