no jump ticks?

main.c

@@ -62,6 +62,7 @@ static float player_vx = 0.0;
 static float player_vy = 0.0;
 static float player_ax = 0.0;
 static float player_ay = 9.81;
+static int jump_ticks = 0;
 
 void key_down(char k)
 {
@@ -71,7 +72,6 @@ void key_down(char k)
 	{
 		case 'a': player_ax = -1; break;
 		case 'd': player_ax = 1; break;
-		case 0x20: player_ay -= 1; break;
 	}
 }
 
@@ -83,7 +83,6 @@ void key_up(char k)
 	{
 		case 'a': player_ax = 0; break;
 		case 'd': player_ax = 0; break;
-		case 0x20: player_ay += 1; break;
 	}
 }
 
@@ -176,6 +175,8 @@ void tick(void)
 
 	/* code to run every tick goes here */
 	erase_entities();
+	if (is_held(' ')) player_ay = -5;
+	else player_ay = 9.81;
 	player_vx += player_ax;
 	player_vy += player_ay;
 	player_x += (int)player_vx;