Add "clear" text when all asteroids destroyed

game.c

@@ -494,6 +494,8 @@ void game_draw()
 		    shapes[i].connect);
 	}
 
+	if (asteroid_count == 0)
+		text_draw("CLEAR");
 	if (dead && !(counter & COUNTER_MASK))
 		text_draw("GAME OVER");
 }

text.c

@@ -34,6 +34,13 @@ static const glyph_t font[] = {
 			{ { -0.75, -2 }, { 0.75, -2 } },
 		},
 	},
+	['C'] = {
+		.line_count = 1,
+		.line_lens = { 4 },
+		.lines = {
+			{ { 1, 4 }, { -1, 4 }, { -1, -4 }, { 1, -4 } },
+		},
+	},
 	['E'] = {
 		.line_count = 2,
 		.line_lens = { 4, 2 },
@@ -49,6 +56,13 @@ static const glyph_t font[] = {
 			{ { 1, 4 }, { -1, 4 }, { -1, -4 }, { 1, -4 }, { 1, -2 } },
 		},
 	},
+	['L'] = {
+		.line_count = 1,
+		.line_lens = { 3 },
+		.lines = {
+			{ { -1, 4 }, { -1, -4 }, { 1, -4 } },
+		},
+	},
 	['M'] = {
 		.line_count = 1,
 		.line_lens = { 5 },