diff --git a/Tetris2000.py b/Tetris2000.py
index e81c22c..9efbed4 100644
--- a/Tetris2000.py
+++ b/Tetris2000.py
@@ -147,7 +147,7 @@ class Matrix(Grid):
         self.speed = consts.INITIAL_SPEED * (0.8 - ((level - 1) * 0.007)) ** (level - 1)
         self.fall_timer.start(self.speed)
         if level > 15:
-            self.lock_delay *= 0.9
+            self.lock_delay *= consts.AFTER_LVL_15_ACCELERATION
 
     def empty_row(self):
         return [None for x in range(self.COLUMNS)]
diff --git a/consts.py b/consts.py
index 377c979..1c8cfcc 100644
--- a/consts.py
+++ b/consts.py
@@ -38,6 +38,7 @@ ENTRY_DELAY = 80
 LINE_CLEAR_DELAY = 80
 LOCK_DELAY = 500
 TEMPORARY_TEXT_DURATION = 1000
+AFTER_LVL_15_ACCELERATION = 0.85
 
 # Block Colors
 BLOCK_BORDER_COLOR = QtGui.QColor(0, 159, 218, 255)
diff --git a/point.py b/point.py
index be97735..71f857c 100644
--- a/point.py
+++ b/point.py
@@ -7,7 +7,7 @@ from qt5 import QtCore
 from propertize import propertize, rename_attributes, snake_case
 
 
-@propertize("", "set")
+@propertize("", "set_")
 @rename_attributes(snake_case)
 class Point(QtCore.QPoint):
     """