Smashell

Description
Smashell is an arcade game in which the player controls a robot (looking similar to a tire) which destroys other robots for points. After choosing a map, the match runs endless after the player is defeated; the goal is to reach a high-score.
At first, the robot can only do regular jumps (maybe enhanced with jump pads on the map) which are required to kill the standard enemies. These leave behind coins which need to be collected for points. From time to time, special buttons pop up which give good stuff when pressed, e.g. temporary invulnerability, continue coins, health refreshments, explosions, faster speed or, most importantly, upgrades. These include, for example, the ability to shoot upwards (handy for flying enemies), double jump or a piggy robot which collects coins. From time to time, a boss has to be defeated. The player character has a health bar and when it is empty, the game is over unless a continue coin is available.