diff --git a/TODO.md b/TODO.md
index 9f8714d1..5614deeb 100644
--- a/TODO.md
+++ b/TODO.md
@@ -3,7 +3,6 @@ We need to make it easy to make your own library using emigui_wasm.
 Maybe we can use build.rs to generate needed stuff, e.g. index.hmtl?
 
 # Code
-* Try it on iPhone
 * Read TTF from browser?
 * requestAnimationFrame
 
diff --git a/build_and_run.sh b/build_and_run.sh
index 855c1aef..bc878529 100755
--- a/build_and_run.sh
+++ b/build_and_run.sh
@@ -1,6 +1,9 @@
 #!/bin/bash
 set -eu
 
+cargo check --all-features
+cargo clippy
+
 # ./build_wasm.sh
 # open "docs/index.html"
 
diff --git a/emigui/src/layout.rs b/emigui/src/layout.rs
index 5a8d21af..463ab4c7 100644
--- a/emigui/src/layout.rs
+++ b/emigui/src/layout.rs
@@ -308,6 +308,10 @@ impl Region {
         self.available_space.y
     }
 
+    pub fn size(&self) -> Vec2 {
+        self.available_space
+    }
+
     pub fn direction(&self) -> Direction {
         self.dir
     }
diff --git a/emigui/src/math.rs b/emigui/src/math.rs
index 3e700cab..0066deb7 100644
--- a/emigui/src/math.rs
+++ b/emigui/src/math.rs
@@ -40,6 +40,14 @@ impl Vec2 {
     }
 }
 
+impl std::ops::Neg for Vec2 {
+    type Output = Vec2;
+
+    fn neg(self) -> Vec2 {
+        vec2(-self.x, -self.y)
+    }
+}
+
 impl std::ops::AddAssign for Vec2 {
     fn add_assign(&mut self, rhs: Vec2) {
         *self = Vec2 {
diff --git a/emigui/src/types.rs b/emigui/src/types.rs
index 0fd1ea40..09142f2d 100644
--- a/emigui/src/types.rs
+++ b/emigui/src/types.rs
@@ -83,7 +83,7 @@ pub struct Outline {
     pub color: Color,
 }
 
-#[derive(Clone, Debug, Serialize)] // TODO: copy
+#[derive(Clone, Debug, Serialize)]
 #[serde(rename_all = "snake_case", tag = "kind")]
 pub enum PaintCmd {
     Circle {
diff --git a/emigui/src/widgets.rs b/emigui/src/widgets.rs
index 457df985..13389903 100644
--- a/emigui/src/widgets.rs
+++ b/emigui/src/widgets.rs
@@ -247,7 +247,7 @@ impl Widget for RadioButton {
 // ----------------------------------------------------------------------------
 
 pub struct Slider<'a> {
-    get_set_value: Box<'a + FnMut(Option<f32>) -> f32>,
+    get_set_value: Box<dyn 'a + FnMut(Option<f32>) -> f32>,
     min: f32,
     max: f32,
     id: Option<Id>,
diff --git a/emigui_glium/src/painter.rs b/emigui_glium/src/painter.rs
index 65d57c20..62c2bcb1 100644
--- a/emigui_glium/src/painter.rs
+++ b/emigui_glium/src/painter.rs
@@ -10,7 +10,7 @@ pub struct Painter {
 }
 
 impl Painter {
-    pub fn new(facade: &glium::backend::Facade) -> Painter {
+    pub fn new(facade: &dyn glium::backend::Facade) -> Painter {
         let program = program!(facade,
             140 => {
                     vertex: "
@@ -127,7 +127,7 @@ impl Painter {
         }
     }
 
-    fn upload_texture(&mut self, facade: &glium::backend::Facade, texture: &emigui::Texture) {
+    fn upload_texture(&mut self, facade: &dyn glium::backend::Facade, texture: &emigui::Texture) {
         if self.current_texture_id == Some(texture.id) {
             return; // No change
         }
diff --git a/example_wasm/src/app.rs b/example_wasm/src/app.rs
index 4a94db04..0d3fdba4 100644
--- a/example_wasm/src/app.rs
+++ b/example_wasm/src/app.rs
@@ -1,4 +1,4 @@
-use emigui::{label, math::*, types::*, widgets::*, Align, Region, TextStyle};
+use emigui::{color::*, label, math::*, types::*, widgets::*, Align, Region, TextStyle};
 
 pub fn show_value_gui(value: &mut usize, gui: &mut Region) {
     gui.add(Slider::usize(value, 1, 1000));
diff --git a/example_wasm/src/lib.rs b/example_wasm/src/lib.rs
index b6efc357..22afa816 100644
--- a/example_wasm/src/lib.rs
+++ b/example_wasm/src/lib.rs
@@ -7,7 +7,7 @@ extern crate emigui;
 extern crate emigui_wasm;
 
 use {
-    emigui::{label, types::srgba, widgets::Label, Align, Emigui, RawInput},
+    emigui::{color::srgba, label, widgets::Label, Emigui, RawInput},
     emigui_wasm::now_sec,
 };