space-shooter | Simple shooter that shows how to use Gosu | Game Engine library

I have been following this tutorial, https://learn.yorkcs.com/2019/02/07/build-a-space-shooter-with-phaser-3-3/ , to make games with Phaser 3 but since I want to deploy them online I'm converting the code to use with TypeScript as I am preparing it via an Ionic 5 app. In the tutorial, I'm supposed to set a player sprite's velocity. For clarity, there are two classes I must create, Entities.js (which I created as entities.ts) and Player.js (which I made into player.ts). The entities are supposed to be an extension of Phaser.GameObjects.Sprite, and the player is supposed to be an entity, extending the entities class. So far, I get everything working except when reaching the part about setting the player's velocity.

This is my entities.ts:

I type:

This is the text of the error

I'm trying to load a few images in my game in Phaser 3.23.0 The images are loaded in the function preload() in the file below

main.js