diff --git a/source/core/cheats.cpp b/source/core/cheats.cpp
index 62c21cb0f..a6734d160 100644
--- a/source/core/cheats.cpp
+++ b/source/core/cheats.cpp
@@ -236,7 +236,7 @@ void ChangeLevel(MapRecord* map, int skill)
 {
 	Net_WriteByte(DEM_CHANGEMAP);
 	Net_WriteByte(skill);
-	Net_WriteString(map->labelName);
+	Net_WriteString(map? map->labelName : nullptr);
 }
 
 //---------------------------------------------------------------------------
diff --git a/source/core/mainloop.cpp b/source/core/mainloop.cpp
index 82a1ad3bd..e40bd95da 100644
--- a/source/core/mainloop.cpp
+++ b/source/core/mainloop.cpp
@@ -139,7 +139,9 @@ static void GameTicker()
 			g_nextskill = -1;
 			FX_StopAllSounds();
 			FX_SetReverb(0);
-			gi->NextLevel(currentLevel, -1);
+			gi->FreeLevelData();
+			gamestate = GS_LEVEL;
+			gi->NextLevel(g_nextmap, -1);
 			break;
 
 		case ga_completed:
@@ -149,7 +151,8 @@ static void GameTicker()
 			{
 				// if the same level is restarted, skip any progression stuff like summary screens or cutscenes.
 				gi->FreeLevelData();
-				gi->NextLevel(currentLevel, g_nextskill);
+				gamestate = GS_LEVEL;
+				gi->NextLevel(g_nextmap, g_nextskill);
 			}
 			else
 				gi->LevelCompleted(g_nextmap, g_nextskill);
@@ -157,13 +160,15 @@ static void GameTicker()
 
 		case ga_nextlevel:
 			gi->FreeLevelData();
-			gi->NextLevel(currentLevel, g_nextskill);
+			gamestate = GS_LEVEL;
+			gi->NextLevel(g_nextmap, g_nextskill);
 			break;
 
 		case ga_newgame:
 			FX_StopAllSounds();
 			FX_SetReverb(0);
 			gi->FreeLevelData();
+			gamestate = GS_LEVEL;
 			gi->NewGame(g_nextmap, g_nextskill);
 			break;
 
@@ -289,6 +294,7 @@ void Display()
 	switch (gamestate)
 	{
 	case GS_MENUSCREEN:
+	case GS_FULLCONSOLE:
 		gi->DrawBackground();
 		break;
 
@@ -314,6 +320,7 @@ void Display()
 		break;
 
 	default:
+		twod->ClearScreen();
 		break;
 	}
 
@@ -392,7 +399,7 @@ void TryRunTics (void)
 	bool doWait = cl_capfps || pauseext || (r_NoInterpolate && !M_IsAnimated());
 
 	// get real tics
-	if (doWait && gamestate != GS_INTERMISSION)	// GS_INTERMISSION needs uncapped frame rate.
+	if (doWait && gamestate != GS_INTERMISSION && gamestate != GS_INTRO)	// GS_INTERMISSION needs uncapped frame rate.
 	{
 		entertic = I_WaitForTic (oldentertics);
 	}
diff --git a/source/core/screenjob.cpp b/source/core/screenjob.cpp
index a821c070a..0aaf49785 100644
--- a/source/core/screenjob.cpp
+++ b/source/core/screenjob.cpp
@@ -415,8 +415,8 @@ class ScreenJobRunner
 	int index = -1;
 	float screenfade;
 	bool clearbefore;
-	uint64_t startTime = -1;
-	uint64_t lastTime = -1;
+	int64_t startTime = -1;
+	int64_t lastTime = -1;
 	int actionState;
 	int terminateState;
 
@@ -474,7 +474,7 @@ public:
 		auto now = I_nsTime();
 		bool processed = job.job->ProcessInput();
 		bool skiprequest = inputState.CheckAllInput() && !processed;
-		if (startTime == -1) startTime = now;
+		if (startTime == -1) lastTime = startTime = now;
 
 		if (M_Active())
 		{
diff --git a/source/games/duke/src/2d_d.cpp b/source/games/duke/src/2d_d.cpp
index 3f2d38697..8ba7adad0 100644
--- a/source/games/duke/src/2d_d.cpp
+++ b/source/games/duke/src/2d_d.cpp
@@ -879,6 +879,7 @@ public:
 
 	int Frame(uint64_t clock, bool skiprequest)
 	{
+		Printf("Clock = %llu\n", clock);
 		if (clock == 0) S_PlayBonusMusic();
 		twod->ClearScreen();
 		int currentclock = int(clock * 120 / 1'000'000'000);
diff --git a/source/games/duke/src/gameloop.cpp b/source/games/duke/src/gameloop.cpp
index 808259c13..96f37eac4 100644
--- a/source/games/duke/src/gameloop.cpp
+++ b/source/games/duke/src/gameloop.cpp
@@ -166,7 +166,7 @@ void GameInterface::NextLevel(MapRecord* map, int skill)
 {
 	ud.m_player_skill = skill + 1;
 	int res = enterlevel(map, 0);
-	if (!res) gameaction = ga_startup;
+	if (res) gameaction = ga_startup;
 }
 
 //---------------------------------------------------------------------------