Free browser-based robotics simulator for teaching (line follower, rescue arenas, block + Python coding) - looking for teacher feedback

[u/ItemMurky]

I’m a tech teacher and built a free 3D robot simulator that runs in the browser. Looking for teachers to try it and tell me what’s confusing or missing.

Link: https://mguedessantos.github.io/simuladorrobotica/?lang=en

What it does:

• Build a robot piece by piece (motors, wheels, color/ultrasonic/gyro sensors, claw), with real weight and tipping physics
• Program with blocks (PictoBlox-style) or Python
• 14 guided tutorial stages, from “make it move” to line following, intersections, obstacles, and ramps
• RoboCupJunior Rescue Line style arenas, including a rescue room with victims
• No install, no account. Save your robot to a file and reopen it later

What I’d like to know:

• Are the stages pitched right for your students’ age?
• Anything confusing in the wording or interface?
• Which blocks, sensors, or challenges are missing?

It’s still in development, so expect bugs. Any feedback helps. I’ll reply to every comment.