diff --git a/android/app/CMakeLists.txt b/android/app/CMakeLists.txt
index 7be5c68c1..85b13309e 100644
--- a/android/app/CMakeLists.txt
+++ b/android/app/CMakeLists.txt
@@ -48,7 +48,7 @@ add_library(classicube SHARED
         ../../src/Protocol.c
         ../../src/World.c
         ../../src/PickedPosRenderer.c
-        ../../src/Platform.c
+        ../../src/Platform_Posix.c
         ../../src/LScreens.c
         ../../src/_truetype.c
         ../../src/_ftglyph.c
@@ -96,6 +96,7 @@ add_library(classicube SHARED
         ../../src/SelectionBox.c
         ../../src/EnvRenderer.c
         ../../src/Animations.c
+        ../../src/LBackend.c
         )
 
 # add lib dependencies
diff --git a/src/Program.c b/src/Program.c
index c0fcf71f6..68bf8e79a 100644
--- a/src/Program.c
+++ b/src/Program.c
@@ -10,38 +10,6 @@
 #include "Server.h"
 #include "Options.h"
 
-/*#define CC_TEST_VORBIS*/
-#ifdef CC_TEST_VORBIS
-#include "ExtMath.h"
-#include "Vorbis.h"
-
-#define VORBIS_N 1024
-#define VORBIS_N2 (VORBIS_N / 2)
-int main_imdct() {
-	float in[VORBIS_N2], out[VORBIS_N], out2[VORBIS_N];
-	double delta[VORBIS_N];
-
-	RngState rng;
-	Random_Seed(&rng, 2342334);
-	struct imdct_state imdct;
-	imdct_init(&imdct, VORBIS_N);
-
-	for (int ii = 0; ii < VORBIS_N2; ii++) {
-		in[ii] = Random_Float(&rng);
-	}
-
-	imdct_slow(in, out, VORBIS_N2);
-	imdct_calc(in, out2, &imdct);
-
-	double sum = 0;
-	for (int ii = 0; ii < VORBIS_N; ii++) {
-		delta[ii] = out2[ii] - out[ii];
-		sum += delta[ii];
-	}
-	int fff = 0;
-}
-#endif
-
 static void RunGame(void) {
 	cc_string title; char titleBuffer[STRING_SIZE];
 	int width  = Options_GetInt(OPT_WINDOW_WIDTH,  0, DisplayInfo.Width,  0);
@@ -150,9 +118,6 @@ int main(int argc, char** argv) {
 	
 	res = Platform_SetDefaultCurrentDirectory(argc, argv);
 	if (res) Logger_SysWarn(res, "setting current directory");
-#ifdef CC_TEST_VORBIS
-	main_imdct();
-#endif
 	Platform_LogConst("Starting " GAME_APP_NAME " ..");
 	String_InitArray(Server.Address, ipBuffer);
 	Options_Load();
diff --git a/src/Vorbis.c b/src/Vorbis.c
index 1b53caec8..7d3aec2dd 100644
--- a/src/Vorbis.c
+++ b/src/Vorbis.c
@@ -973,19 +973,6 @@ static cc_result Mapping_DecodeSetup(struct VorbisState* ctx, struct Mapping* m)
 *------------------------------------------------------imdct impl---------------------------------------------------------*
 *#########################################################################################################################*/
 #define PI MATH_PI
-void imdct_slow(float* in, float* out, int N) {
-	double sum;
-	int i, k;
-
-	for (i = 0; i < 2 * N; i++) {
-		sum = 0;
-		for (k = 0; k < N; k++) {
-			sum += in[k] * Math_Cos((PI / N) * (i + 0.5 + N * 0.5) * (k + 0.5));
-		}
-		out[i] = sum;
-	}
-}
-
 static cc_uint32 Vorbis_ReverseBits(cc_uint32 v) {
 	v = ((v >> 1) & 0x55555555) | ((v & 0x55555555) << 1);
 	v = ((v >> 2) & 0x33333333) | ((v & 0x33333333) << 2);