Improve handling and fix some bugs

tetris.py

@@ -570,6 +570,8 @@ class Game:
                 if not self.intersects_board(*np, new_piece):
                     self.current_block = new_piece
                     self.current_block_pos = np
+                    # give the user some leeway to splin many times
+                    self.subcell_drop = 0
                     return
 
     def move_current_piece(self, dir: Direction):
@@ -577,6 +579,8 @@ class Game:
         self.subcell_move += dx
         move_cell = int(self.subcell_move)
         self.subcell_move -= move_cell
+        # give the user some leeway to move in tight quarters
+        self.subcell_drop = 0
         if move_cell:
             new_pos = Cell(
                 self.current_block_pos.x + move_cell, self.current_block_pos.y
@@ -837,6 +841,7 @@ class Game:
             self.process_and_draw_help_overlay()
 
     def start_new_game(self):
+        self.cur_random_peice_seq = None
         self.clear_board()
         self.next_piece = None
         self.swap_in_next_piece(True)
@@ -941,7 +946,6 @@ class Game:
             self.clock.tick(Game.FRAMERATE)
 
     def swap_in_next_piece(self, force: bool = False):
-        self.cur_random_peice_seq = None
         if not self.next_piece or force:
             self.next_piece = self.random_tetromino()
             self.current_block = self.random_tetromino()