Refactored Menus and HUD

[sulysu]

Hi, Please test on the su_midterm_ui branch first cuz there r plenty of changes. Lemme know if there is any problem. Thank you!

Need to do after merge:

• Change Text Color in HUD
• Popup Text color
• Add key p to pause in level1 tutorial

Currently, not able to implement the in-level pause button.

[gautam17pranjal]

Observations:

• the in-level pause button not present (you listed it above, so should be okay). Also since we are moving with pressing the 'P' key. Maybe from a UI end we can redesign the btn to have a 'P' on the btn icon.

Inside the Pause Menu:

• nice transparency with the Pause HUD
• the Pause and play btn works
• for rest of the reviewers @biyaniM, @schsu1 on clicking the home btn, the time doesn't stop since the "Menu" Scene is not in project build but it will work when everything comes together.
• the restart btn works good
• the controls hud is not attached for now. should be fine, once you attach it.

Rest LGTM! good work.

[biyaniM]

Really really good work @sulysu ! Now the game really looks like taking shape.

Observations -

1. On dying due to falling down or because of the enemy the HUD says "NO HEALTH POINT LEFT! YOU DIED!". I'd say just "YOU DIED!" works as well.
2. Similarly, on falling it says "YOU FALLED IN THE DEATH ZONE". I'd say just "YOU DIED!" works as well.
3. As you mentioned, the Pause menu button hasn't been implemented yet, that's cool. I / The team can lend a hand in that.
4. Idk if you mentioned this in chat or not but, the Menu button isn't loading levels. The error is something like Scene 'Level_0' couldn't be loaded because it has not been added to the build settings or the AssetBundle has not been loaded. It probably is because the scenes aren't loaded in the AssetBundle. I've fixed that by adding the scenes in the Build Settings.
5. I noticed that the Pause button prefab wasn't attached to the HUD, but that seems like a minor problem for later.
6. Nit: The coins HUD at the top right should show 7/7 instead of 8/7? The coin update can be something like min(MAX, current coin)
7. IMP: Need to add a back button to the tutorial Scene (back to the main menu)

level 1: next level button doesn't work yet level 2: the death scene for falling says no health points, can we change that? level 3: the finish boundary isn't attached to the HUD the levels except level 1 don't have the pause menu attached yet didn't get to test the level complete for levels 3 and 4 because I suck, but checked the editor

@schsu1 haha, I agree that level 3 needs to be made easier.

@sulysu I am going to resolve the conflicts now, there are a lot but I shall try my best to not break anything 🙃. Also, will approve after that.