Thanks for your feedback!
Regarding the jump button, does the jump button work intermittently on every area? on the ground and the platform?
For the "T" button, it is used to block the rain, you can press it while standing in front of the red wheel handle.
The downloadable version has bugs but we have to keep it, we uploaded the fixed webgl version. ( webgl is the correct version to play)
Thanks for your words, we will improve the game soon but maybe not during the jam rating period.