Update README.md

Author: michal34512

README.md

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-# Jelly-Rider
+# Jelly Rider
+Unity-based mobile game with two gameplay modes:
+* <b>Endless Mode: </b>In this mode, you play indefinitely until your character dies. The objective is to achieve the highest score possible by surviving and earning points by overcoming different obstacles.
+* <b>Level-based Mode: </b>In this mode, the gameplay revolves around completing levels. Each level presents unique obstacles that the player must overcome in order to progress further in the game.
+
+<p align="center">This game is unfinished!</p>
+
+# Gameplay screenshots
+![obraz](https://github.com/michal34512/Jelly-Rider/assets/136522993/20f0d5f6-4da6-4b3f-8a64-4915eb71573b)
+
+![obraz](https://github.com/michal34512/Jelly-Rider/assets/136522993/013a428b-4409-40ce-9a3c-b31e494917dd)
+
+![obraz](https://github.com/michal34512/Jelly-Rider/assets/136522993/64b9df20-7959-4a83-ac32-f6dfe92d41ba)
+
+![obraz](https://github.com/michal34512/Jelly-Rider/assets/136522993/a7048102-7cb4-46ad-b1d9-cc942a6f552d)
+
+![obraz](https://github.com/michal34512/Jelly-Rider/assets/136522993/f8aea02e-29e7-466e-81a0-b5b304f1bf2d)