diff --git a/chameleonic.p8 b/chameleonic.p8
index f6b8c92..863cb6f 100644
--- a/chameleonic.p8
+++ b/chameleonic.p8
@@ -231,9 +231,7 @@ end
 function level:reinit(n)
  self.ix=n
  self.todo={}
- self.bigx=(n%8)
- self.bigy=(n\8)
- self.next_crate_id=1
+ self.bigx,self.bigy=n%8,n\8
 
  self:load_dynobjs()
  self:recollide()
@@ -302,7 +300,7 @@ function level:update()
  end
  if #remove>0 then
   self:recollide()
-  self:reanchor(true)
+  self:reanchor()
  end
 end
 
@@ -310,6 +308,7 @@ function level:load_dynobjs()
  self._crates={}
  self._pits={}
 
+ local crate_id=1
  for mx=0,15,1 do
   for my=0,15,1 do
    local mxy=_mix(mx,my)
@@ -319,22 +318,16 @@ function level:load_dynobjs()
    if def then
     self._crates[mxy]={
      s=s,def=def,
-     id=self.next_crate_id,
+     id=crate_id,
      mx=mx,my=my,
      px=px,py=py,
      todo={}
     }
-    self.next_crate_id+=1
+    crate_id+=1
    end
 
-   if s==28 then -- pit
-    self._pits[mxy]={
-      s=s,
-      mx=mx,my=my,
-      px=px,py=py,
-      contents=nil
-    }
-   end
+   -- pit
+   if (s==28) self._pits[mxy]={s=s,mx=mx,my=my,px=px,py=py}
   end
  end
 end
@@ -405,17 +398,11 @@ function level:reanchor()
  end
  shellsort(self._anch_keys)
  for point in self:anchor_points() do
-  if point.ax_old!=nil then
-   if (player.rope!=nil) player.rope:be_pushed_by(point,point.ax_old,point.ay_old)
-   point.ax_old=nil
-   point.ay_old=nil
-  end
- end
- for point in self:anchor_points() do
-  assert(not point.dropped)
+  if (point.ax_old and player.rope) player.rope:be_pushed_by(point,point.ax_old,point.ay_old)
+  point.ax_old,point.ay_old=nil,nil
  end
 
- if (player.rope!=nil) player.rope:relax()
+ if (player.rope) player.rope:relax()
 end
 
 function level:win_at(mx,my)
@@ -485,14 +472,10 @@ end
 
 function _amix(ax,ay)
  return ax..","..ay
- --if (ax<0 or ay<0 or ax>31 or ay>31) return nil
- --return ay*32+ax
 end
 
 function _mix(mx,my)
   return mx..","..my
- --if (mx<0 or my<0 or mx>15 or my>15) return nil
- --return my*16+mx
 end
 
 function level:_get_cratedef(s)
@@ -553,35 +536,23 @@ function level:can_move(
  is_player,
  mx0,my0,dmx,dmy,exclude_src,exclude_dst
 )
- if is_player and self:win_at(mx0+dmx,my0+dmy) then
-  return true 
- end
- if is_player and self:get_open_pit(mx0+dmx,my0+dmy) then
-  return wrongbleep:adequately_warned()
- end
+ local mx1,my1=mx0+dmx,my0+dmy
+ if (is_player and self:win_at(mx1,my1)) return true 
+ if (is_player and self:get_open_pit(mx1,my1)) return wrongbleep:adequately_warned()
 
- if self:mcoll(mx0+dmx,my0+dmy) then
-  return false
- end
+ if (self:mcoll(mx1,my1) or player.x==mx1 and player.y==my1) return false
 
- if player.x==mx0+dmx and player.y==my0+dmy then
-  return false
- end
- 
- -- todo: check tongue collision
  if player.rope then
   local chk=false
-  if dmx==0 and dmy==-1 then
-   chk=player.rope:collide_mrect(mx0+0.4,my0-0.8,0.2,1.6,exclude_src,exclude_dst)
-  elseif dmx==0 and dmy==1 then
-   chk=player.rope:collide_mrect(mx0+0.4,my0+0.2,0.2,1.6,exclude_src,exclude_dst)
-  elseif dmx==-1 and dmy==0 then
-   chk=player.rope:collide_mrect(mx0-0.8,my0+0.4,1.6,0.2,exclude_src,exclude_dst)
-  elseif dmx==1 and dmy==0 then
-   chk=player.rope:collide_mrect(mx0+0.2,my0+0.4,1.6,0.2,exclude_src,exclude_dst)
-  end
+  local w,h=1.6,0.2
+  if (dmx==0) w,h=0.2,1.6
 
-  if (chk) return false
+  if (dmy==-1) rectx,recty=0.4,-0.8
+  if (dmy==1) rectx,recty=0.4,0.2
+  if (dmx==-1) rectx,recty=-0.8,0.4
+  if (dmx==1) rectx,recty=0.2,0.4
+
+  if (player.rope:collide_mrect(mx0+rectx,my0+recty,w,h,exclude_src,exclude_dst)) return false
  end
  
  return true
@@ -590,22 +561,21 @@ end
 function level:tug_crate(mx0,my0,dmx,dmy)
  local mxy0=_mix(mx0,my0)
  local existing=self._crates[mxy0]
- if (existing==nil) return
+ if (not existing) return
  
  self._crates[mxy0]=nil
-
  local mx1,my1=mx0+dmx,my0+dmy
- local mxy1=_mix(mx1,my1) 
+ local px1,py1=mx1*8,my1*8
  existing.todo={
-  {px=mx1*8+dmx,py=my1*8+dmy,mx=mx1,my=my1,update=function()
+  {px=px1+dmx,py=py1+dmy,mx=mx1,my=my1,update=function()
    self:recollide()
    self:reanchor()
    return true
   end},
-  {px=mx1*8,py=my1*8}
+  {px=px1,py=py1}
  }
 
- self._crates[mxy1]=existing
+ self._crates[_mix(mx1,my1)]=existing
 end
 
 -->8