diff --git a/pqcli/random.py b/pqcli/random.py
index 61e543c..57eb83e 100644
--- a/pqcli/random.py
+++ b/pqcli/random.py
@@ -2,8 +2,8 @@ import random
 import typing as T
 
 
-def seed(seed: T.Any) -> None:
-    random.seed(seed)
+def seed(source: T.Any) -> None:
+    random.seed(source)
 
 
 def choice(source: T.Iterable[T.Any]) -> T.Any:
diff --git a/pqcli/ui/__init__.py b/pqcli/ui/__init__.py
index 4215506..bdc6cab 100644
--- a/pqcli/ui/__init__.py
+++ b/pqcli/ui/__init__.py
@@ -8,17 +8,6 @@ from pqcli.ui.new_game_view import NewGameView
 from pqcli.ui.roster_view import RosterView
 
 
-for key, direction in {
-    "k": "up",
-    "j": "down",
-    "h": "left",
-    "l": "right",
-}.items():
-    for key_variant in {key, key.upper()}:
-        urwid.command_map[key_variant] = f"cursor {direction}"
-urwid.command_map["tab"] = f"cursor down"
-urwid.command_map["shift tab"] = f"cursor up"
-
 PALETTE: T.List[T.Tuple[str, str, str]] = [
     ("button", "", ""),
     ("button-focus", "light red", "black"),
@@ -29,8 +18,23 @@ PALETTE: T.List[T.Tuple[str, str, str]] = [
 ]
 
 
+def bind_commands() -> None:
+    for key, direction in {
+        "k": "up",
+        "j": "down",
+        "h": "left",
+        "l": "right",
+    }.items():
+        for key_variant in {key, key.upper()}:
+            urwid.command_map[key_variant] = f"cursor {direction}"
+    urwid.command_map["tab"] = f"cursor down"
+    urwid.command_map["shift tab"] = f"cursor up"
+
+
 class Ui:
     def __init__(self, roster: Roster) -> None:
+        bind_commands()
+
         self.roster = roster
         self.loop = urwid.MainLoop(
             None, PALETTE, unhandled_input=self.unhandled_input
@@ -57,7 +61,6 @@ class Ui:
     def switch_to_roster_view(self) -> None:
         self.loop.widget = RosterView(
             self.roster,
-            self.loop,
             on_exit=self.switch_to_exit_view,
             on_new_game=self.switch_to_new_game_view,
             on_resume_game=self.switch_to_game_view,
@@ -76,7 +79,7 @@ class Ui:
         )
 
     def switch_to_game_view(self, player_name: str) -> None:
-        ...
+        raise NotImplementedError("not implemented")
 
     def exit(self) -> None:
         raise urwid.ExitMainLoop()
diff --git a/pqcli/ui/exit_view.py b/pqcli/ui/exit_view.py
index 3678b96..eebd1ff 100644
--- a/pqcli/ui/exit_view.py
+++ b/pqcli/ui/exit_view.py
@@ -2,7 +2,6 @@ import typing as T
 
 import urwid
 
-from pqcli.mechanic import Roster
 from pqcli.ui.button import MenuButton
 
 
diff --git a/pqcli/ui/line_box.py b/pqcli/ui/line_box.py
index d6a9e7d..6651d4f 100644
--- a/pqcli/ui/line_box.py
+++ b/pqcli/ui/line_box.py
@@ -15,4 +15,4 @@ class LineBox(urwid.AttrWrap):
             ),
             "linebox",
             "linebox-focus",
-        ),
+        )
diff --git a/pqcli/ui/new_game_view.py b/pqcli/ui/new_game_view.py
index ae8b0e4..24d840e 100644
--- a/pqcli/ui/new_game_view.py
+++ b/pqcli/ui/new_game_view.py
@@ -5,7 +5,7 @@ import urwid
 import urwid_readline
 
 from pqcli.config import CLASSES, PRIME_STATS, RACES
-from pqcli.mechanic import Stats, StatsBuilder, generate_name
+from pqcli.mechanic import StatsBuilder, generate_name
 from pqcli.ui.button import MenuButton
 from pqcli.ui.line_box import LineBox
 
diff --git a/pqcli/ui/roster_view.py b/pqcli/ui/roster_view.py
index b0e593b..68b61c3 100644
--- a/pqcli/ui/roster_view.py
+++ b/pqcli/ui/roster_view.py
@@ -10,7 +10,6 @@ class RosterView(urwid.Filler):
     def __init__(
         self,
         roster: Roster,
-        loop: urwid.MainLoop,
         on_new_game: T.Callable,
         on_resume_game: T.Callable,
         on_exit: T.Callable,