The game looks alright at the moment, besides the UI issues you’ve already covered. Here is my feedback on specific aspects of the game:
Tutorial
I wasn’t able to get the full experience of the tutorial because of the UI glitch, but I was able to gather a few opinions.
The white text in the corner of the screen isn’t very eye-catching and will probably cause some users to skip the tutorial. I’d suggest configuring its design to be more similar to the other UI, placing it in the bottom centre of the screen and possibly using a typewriter effect to draw more attention to the words. It would also be a good idea to allow the player to watch the tutorial over again.
Buildings and Models
The central building style of the game is good. I like the textured blocky look of most of the structures.
The problems start with some of the other props. The clay-like low-poly style used in some of the scenery clashes a lot with the buildings.
A lot of the low-poly props are also untextured, which gives the game a bit of an uneven look.
If you work on making these models fit better with the main building style of the game, its visual appeal will improve a lot, at least from my perspective.
Gameplay
I played the bomb and lava minigames, and they seem to work well. My one suggestion is to make the games require a certain number of players to start (or at least a certain number to actually be able to gain wins from the round) since some of the minigames could probably be farmed for wins with only one player.
You don’t need to remove the elevator, but I would prefer if you didn’t add arrows and instead replaced the “Teleport to elevator” button with a “Join game” button that would automatically put you inside the elevator. I’m just a bit worried about whether large arrows would feel disruptive to the appearance of the game since I’m not a fan of how they look in simulators.
UI
Ignoring the visual glitches, I personally don’t like the look of the UI. There’s not much more to it than flat colours and UICorners, which feels a bit boring and out of place to me. I’m not a very proficient UI designer myself, but I think you could improve the design by adding borders of some kind to the buttons and frames. Work on adding something to the UI that blends it in with the building style at least.
Final Thoughts
At the moment, the game is making good progress. In the amount I played of it, I couldn’t find any serious issues (besides the UI glitch, which has been fixed). It’s got a solid foundation, although it could use a few original new gameplay ideas later down the line to differentiate it from games before it. Overall, good work so far.