diff --git a/gui/lander/lander.tal b/gui/lander/lander.tal
index 2601190..bb6b3c7 100644
--- a/gui/lander/lander.tal
+++ b/gui/lander/lander.tal
@@ -7,6 +7,12 @@
 |80 @Controller &vector $2 &button $1 &key $1
 |90 @Mouse &vector $2 &x $2 &y $2 &state $1 &wheel $1
 
+|0000
+
+	@pos &x $2 &y $2
+	@force &x $2 &y $2
+	@angle $2
+
 |0100 ( -> )
 
 	( theme )
@@ -31,16 +37,22 @@ BRK
 	[ LIT &f $1 ] INCk ,&f STR
 	#01 AND ?&no-read
 	.Controller/button DEI
-	DUP #80 NEQ ?&no-u
-		;get-pt/offset LDA #01 SUB ;get-pt/offset STA
-		;draw-lander/plume LDA INC ;draw-lander/plume STA
+	DUP #10 NEQ ?&no-u
+		.force/y LDZ2 #0008 SUB2 .force/y STZ2
 		&no-u
-	DUP #40 NEQ ?&no-d
-		;get-pt/offset LDA INC ;get-pt/offset STA
+	DUP #40 NEQ ?&no-l
+		.angle LDZ2 #0001 SUB2 .angle STZ2
 		;draw-lander/plume LDA INC ;draw-lander/plume STA
-		&no-d
+		&no-l
+	DUP #80 NEQ ?&no-r
+		.angle LDZ2 INC2 .angle STZ2
+		;draw-lander/plume LDA INC ;draw-lander/plume STA
+		&no-r
 	POP
+
 	&no-read
+	apply-force
+	( .force/y LDZ2 phex #0a18 DEO )
 	redraw
 
 BRK
@@ -49,6 +61,23 @@ BRK
 
 BRK
 
+(
+@|core )
+
+@apply-force ( -- )
+
+	.force/y LDZ2 INC2 .force/y STZ2
+	.force/y LDZ2 reduce .pos/y LDZ2 ADD2 .pos/y STZ2
+
+JMP2r
+
+@reduce ( force* -- )
+
+	DUP2 #8000 AND2 ORA ?&neg
+	#02 SFT2
+JMP2r
+&neg abs2 #02 SFT2 #0000 SWP2 SUB2 JMP2r
+
 (
 @|drawing )
 
@@ -82,8 +111,8 @@ JMP2r
 	( face )
 	#26 .Screen/auto DEO
 	;face-icn .Screen/addr DEO2
-	#0014 .Screen/x DEO2
-	#0014 .Screen/y DEO2
+	#0014 .pos/x LDZ2 ADD2 .Screen/x DEO2
+	#0014 .pos/y LDZ2 ADD2 .Screen/y DEO2
 	#05 .Screen/sprite DEOk DEOk DEO
 	#00 .Screen/auto DEO
 
@@ -105,9 +134,9 @@ JMP2r
 
 @get-pt ( id rad -- x* y* )
 
-	#00 SWP STH2 
+	#00 SWP STH2
 
-	[ LIT &offset $1 ] ADD
+	.angle LDZ2 NIP ADD
 
 !get-point/force
 
@@ -119,9 +148,11 @@ JMP2r
 	#00 SWP ;circle-tbl ADD2 LDA2
 	#00 SWP STH2kr MUL2 #04 SFT2
 	( center ) #0080 STH2kr #30 SFT2 SUB2 ADD2 #02 SFT2
+	( pos ) .pos/y LDZ2 ADD2
 	ROT
 	#00 SWP STH2kr MUL2 #04 SFT2
 	( center ) #0080 STH2kr #30 SFT2 SUB2 ADD2 #02 SFT2
+	( pos ) .pos/x LDZ2 ADD2
 	SWP2
 	POP2r
 
@@ -178,7 +209,7 @@ JMP2r
 0804 0201 0000 0000 c33c 0081 7e00 0000
 1020 4080 0000 0000
 
- ]
+]
 
 @circle-tbl [
 	8000 9802 b009 c715 da25 ea38 f64f fd67