diff --git a/src/API/Script.ts b/src/API/Script.ts
index 61ad10c..d332d7d 100644
--- a/src/API/Script.ts
+++ b/src/API/Script.ts
@@ -9,7 +9,7 @@ export const script = (app: Editor) => (...args: number[]): void => {
       blinkScript(app, "local", arg);
       tryEvaluate(
         app,
-        app.universes[app.selected_universe].locals[arg],
+        app.universes[app.selected_universe]!.locals[arg]!,
       );
     }
   });
@@ -18,7 +18,7 @@ export const script = (app: Editor) => (...args: number[]): void => {
 export const s = script;
 
 export const delete_script = (app: Editor) => (script: number): void => {
-  app.universes[app.selected_universe].locals[script] = {
+  app.universes[app.selected_universe]!.locals[script] = {
     candidate: "",
     committed: "",
     evaluations: 0,
@@ -27,7 +27,7 @@ export const delete_script = (app: Editor) => (script: number): void => {
 
 export const copy_script = (app: Editor) => (from: number, to: number): void => {
   app.universes[app.selected_universe].locals[to] = {
-    ...app.universes[app.selected_universe].locals[from],
+    ...app.universes[app.selected_universe]!.locals[from],
   };
 };
 
diff --git a/src/DOM/DomElements.ts b/src/DOM/DomElements.ts
index fe5feaf..3c4f783 100644
--- a/src/DOM/DomElements.ts
+++ b/src/DOM/DomElements.ts
@@ -44,6 +44,7 @@ export const singleElements = {
   error_line: "error_line",
   hydra_canvas: "hydra-bg",
   feedback: "feedback",
+  scope: "scope",
 } as const;
 
 export type SingleElementsKeys = keyof typeof singleElements;
diff --git a/src/DOM/WindowBehavior.ts b/src/DOM/WindowBehavior.ts
index 203e06c..3d54a0a 100644
--- a/src/DOM/WindowBehavior.ts
+++ b/src/DOM/WindowBehavior.ts
@@ -38,15 +38,12 @@ export const installWindowBehaviors = (
   window: Window,
   preventMultipleTabs: boolean = false,
 ) => {
+  window.addEventListener("resize", () =>
+    handleResize(app.interface.feedback as HTMLCanvasElement),
+  );
   window.addEventListener("resize", () =>
     handleResize(app.interface.scope as HTMLCanvasElement),
   );
-  window.addEventListener("resize", () =>
-    handleResize(app.interface.feedback as HTMLCanvasElement),
-  );
-  window.addEventListener("resize", () =>
-    handleResize(app.interface.feedback as HTMLCanvasElement),
-  );
   window.addEventListener("beforeunload", (event) => {
     event.preventDefault();
     saveBeforeExit(app);
@@ -57,13 +54,13 @@ export const installWindowBehaviors = (
   });
 
   if (preventMultipleTabs) {
-    localStorage.openpages = Date.now();
+    localStorage["openpages"] = Date.now();
     window.addEventListener(
       "storage",
       function(e) {
         if (e.key == "openpages") {
           // Listen if anybody else is opening the same page!
-          localStorage.page_available = Date.now();
+          localStorage["page_available"] = Date.now();
         }
         if (e.key == "page_available") {
           document.getElementById("all")!.classList.add("invisible");
diff --git a/src/classes/ZPlayer.ts b/src/classes/ZPlayer.ts
index 29d265e..943606a 100644
--- a/src/classes/ZPlayer.ts
+++ b/src/classes/ZPlayer.ts
@@ -250,6 +250,7 @@ export class Player extends AbstractEvent {
     } else {
       return SkipEvent.createSkipProxy();
     }
+    return
   }
 
   public midi(value: number | undefined = undefined) {
@@ -282,6 +283,7 @@ export class Player extends AbstractEvent {
     } else {
       return SkipEvent.createSkipProxy();
     }
+    return null;
   }
 
   scale(name: string|number[]) {
@@ -475,6 +477,7 @@ export class Player extends AbstractEvent {
       }
       return this;
     }
+    return this
   }
 
   wait(value: number | string | Function) {
diff --git a/src/main.ts b/src/main.ts
index 03ba582..5b7c9e0 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -69,7 +69,8 @@ export class Editor {
   show_error: boolean = false;
   currentThemeName: string = "Everblush";
   buttonElements: Record<string, HTMLButtonElement[]> = {};
-  interface!: ElementMap;
+  // @ts-ignore
+  interface: ElementMap = {};
   blinkTimeouts: Record<number, number> = {};
   osc: OscilloscopeConfig = {
     enabled: false,