diff --git a/firmware/basic/basic.h b/firmware/basic/basic.h
index 4025232..694e778 100644
--- a/firmware/basic/basic.h
+++ b/firmware/basic/basic.h
@@ -171,12 +171,12 @@ uint16_t crc16(uint8_t * buf, int len);
 // menu.c
 
 struct MENU_DEF {
-    char *text;
+    const char *text;
     void (*callback)(void);
 };
 
 struct MENU {
-    char *title;
+    const char *title;
     struct MENU_DEF entries[];
 };
 
diff --git a/firmware/l0dable/1boot.c b/firmware/l0dable/1boot.c
index a544663..06a6063 100644
--- a/firmware/l0dable/1boot.c
+++ b/firmware/l0dable/1boot.c
@@ -117,7 +117,7 @@ static bool screen_overview() {
 	while (key != BTN_ENTER) {
 		lcdClear();
 		lcdPrintln("Privacy:");
-		lcdPrintln(levels[GLOBAL(privacy)]);
+		lcdPrintln(levels[(int)GLOBAL(privacy)]);
 		lcdPrintln("");
 		lcdPrintln("Nickname:");
 		lcdPrintln(GLOBAL(nickname));
diff --git a/firmware/l0dable/jeopardy.c b/firmware/l0dable/jeopardy.c
index c3b31d1..35b0c4c 100644
--- a/firmware/l0dable/jeopardy.c
+++ b/firmware/l0dable/jeopardy.c
@@ -90,6 +90,8 @@ void setLeft();
 void setRight();
 struct packet a;
 
+void setJeopardy();
+
 void ram(void)
 {
     int priv = GLOBAL(privacy);
@@ -103,7 +105,7 @@ void ram(void)
     nrf_config_set(&config);
 
     nrf_set_strength(3);
-    int rnd;
+//    int rnd;
 
    volatile uint16_t i;
     while( 1 ){
diff --git a/firmware/l0dable/jump.c b/firmware/l0dable/jump.c
index a83d940..e1add11 100644
--- a/firmware/l0dable/jump.c
+++ b/firmware/l0dable/jump.c
@@ -221,7 +221,7 @@ static void draw_platforms() {
 }
 
 static void draw_player() {
-	bool* sprite;
+	const bool* sprite;
 	if(game.player_y_vel > 0) {
 		sprite = PLAYER_SPRITE_DOWN;
 	}
diff --git a/firmware/l0dable/nick_work.c b/firmware/l0dable/nick_work.c
index 2875c3d..519fa4a 100644
--- a/firmware/l0dable/nick_work.c
+++ b/firmware/l0dable/nick_work.c
@@ -71,11 +71,12 @@ int melody_timeout;
 
 static void init_lilakit(void);
 static void tick_lilakit(void);
+void melody_play(void);
 static void mainloop();
 void handler(void);
 
 void ram(void) {
-    timer32Callback0 = handler;
+    timer32Callback0 = (uint32_t) handler;
     
     /* Enable the clock for CT32B0 */
     SCB_SYSAHBCLKCTRL |= (SCB_SYSAHBCLKCTRL_CT32B0);
diff --git a/firmware/l0dable/people.c b/firmware/l0dable/people.c
index 4f85e17..28118f6 100644
--- a/firmware/l0dable/people.c
+++ b/firmware/l0dable/people.c
@@ -29,7 +29,7 @@ void ram(void) {
         if( nrf_rcv_pkt_time(64,sizeof(buf),buf) == 16 ){
             buf[14] = 0;
             if( buf[1] == 0x23 || buf[1] == 0x24){
-                lcdPrintln(buf+6);
+                lcdPrintln((char*)(buf+6));
                 //lcdPrintln("foo");
             }
             lcdRefresh();
diff --git a/firmware/l0dable/pongo.c b/firmware/l0dable/pongo.c
index 150ea22..891c05f 100644
--- a/firmware/l0dable/pongo.c
+++ b/firmware/l0dable/pongo.c
@@ -113,6 +113,9 @@ void init();
  ** Code Section
 *********************************************/
 
+void init();
+void ram();
+
 void game(void)
 {
   init();
@@ -139,7 +142,7 @@ void game(void)
   }
 }
 
-init()
+void init()
 {
   // init ball
   ball1.size = PONG_BALL_SIZE;
diff --git a/firmware/l0dable/r_player.c b/firmware/l0dable/r_player.c
index c2602df..da538ca 100644
--- a/firmware/l0dable/r_player.c
+++ b/firmware/l0dable/r_player.c
@@ -34,11 +34,11 @@ struct packet{
             uint8_t x;
             uint8_t y;
             uint8_t flags;
-            uint8_t text[16];
+            char text[16];
         }__attribute__((packed)) text;
         struct nick{
             uint8_t flags;
-            uint8_t nick[18];
+            char nick[18];
         }__attribute__((packed)) nick;
         struct nickrequest{
            uint8_t reserved[19];
@@ -55,7 +55,7 @@ struct packet{
            uint8_t gameFlags;
            uint8_t interval;
            uint8_t jitter;
-           uint8_t gameTitle[8];
+           char gameTitle[8];
         }__attribute__((packed)) announce;
         struct join{
            uint16_t gameId;
@@ -93,7 +93,7 @@ uint16_t gameId;
 uint8_t interval;
 uint8_t jitter;
 uint8_t flags;
-uint8_t *gameTitle;
+char *gameTitle;
 
 void sendButton(uint8_t button);
 void sendJoin(uint32_t game);
@@ -321,7 +321,7 @@ void processNickRequest( struct nickrequest *nq)
     p.id= id;
     p.ctr= ++ctr;
     p.c.nick.flags = 0;
-    uint8_t *nick = GLOBAL(nickname);
+    char *nick = GLOBAL(nickname);
     strcpy(p.c.nick.nick, nick);
     nrf_snd_pkt_crc(sizeof(p),(uint8_t*)&p);
 }
@@ -374,7 +374,7 @@ void processText(struct text *t)
     if( t->flags & FLAGS_CLS )
        lcdClear() ;
     lcdSetCrsr(t->x, t->y);
-    t->text[16] = 0;
+    t->text[16] = 0; // XXX:Actually ok, beause the CRC is there. But evil!
     lcdPrint(t->text);
     lcdRefresh();
 }
diff --git a/firmware/l0dable/scope.c b/firmware/l0dable/scope.c
index 6b44ecb..7603be6 100644
--- a/firmware/l0dable/scope.c
+++ b/firmware/l0dable/scope.c
@@ -116,7 +116,7 @@ void ram(void) {
 	case BTN_RIGHT: if (kok) { xs++; xs&=63; kok=0; } break;      
 	case BTN_UP: if (kok) { ch++; ch&=7; kok=0; } break;
 	case BTN_DOWN: if (kok) { ch--; ch&=7; kok=0; } break;
-	case BTN_ENTER: return 0;
+	case BTN_ENTER: return;
 	default: kok=1;
 	}
       }
diff --git a/firmware/main.c b/firmware/main.c
index e94a188..15ed254 100644
--- a/firmware/main.c
+++ b/firmware/main.c
@@ -4,7 +4,10 @@
 #include "core/pmu/pmu.h"
 
 #include "basic/basic.h"
+#include "basic/config.h"
 #include "lcd/render.h"
+#include "lcd/print.h"
+#include "usb/usbmsc.h"
 #include "filesystem/ff.h"
 
 
@@ -34,7 +37,7 @@
 
 void wrapper(void);
 
-int main(void) {
+void main(void) {
     // Configure cpu and mandatory peripherals
     cpuInit();                                // Configure the CPU
 // we do it later